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已知在Rt△ABC中,∠C=90°,cosA=,则sinB的值是A.B.C.D.
试题详情
已知在Rt△ABC中,∠C=90°,cosA=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAE0SURBVEhL1ZY9DsMgDIV9LgaOk52bMHMQVg6S
gaO4mNIA5jdROzRSpaiCz88P/BTAzgMAuPOjrTAC9P7vrv0TgFPZE+Uq0RseOFTXpvAeDC4Za4D3
6IuaTt0FFJu9kQj3WyCCRyPT3XgGSDK8QRk8kCY3BWiP5PBxiaVbOHp4G2CtjWu1ABT6jO8zANKR
Fm3kUlHJW8UYQF5ILDqoZ+EI0klFCYiSr+GqNzfDdGqBIPS8BWZO4xapmHqwAixN3AHsZkEqtpc+
vYRqTLxT+bN2fOU2aT8ClAkkTZUHXFirgCaOJRDPgBLSALxzVcV4lScq1h6w6Vu3wFbwDLwHqPzo
n+ukBZp9hW5xH4YAp9rZ77G6AHK+Ct9gJAvjnJ+cSqa1gzNuZX2MTz3YnKX+B8bu5q/kwQut7P6b
b/Nk4wAAAABJRU5ErkJggg==
)
,则sinB的值是( )
A.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
55DEIB13RFOjUSfVZ2a9eL4BYBXpBOX9qe0AAAAASUVORK5CYII=
)
B.
![](https://img.xintiku.com/upload/f7/fb/f7fb515942c96fe9955019b17658779c.png)
C.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEnSURBVEhL1VbLDcMgDPVcHBgndzbhzCBcGaQH
RnGBUOLwM0Sq1EaKFEX28/OL/Qhg5wIAXLljKowAeu+7sX8C4NSliXI30gsaOFQlKTwHgSkGD+A9
elLTqV0AkuyNRNhvISJ4NDLPxjOATMMblEEDaa6mAO2RFT4K2TiFo6tuA6y1KVYLQKFf6XkGgPGT
kjauUonJyWIMELWQSDq478IRqEcWFCBRLst1T26W6aUFgtDzFipxGrUii6kGHAAr4grAqhfkYmvu
03OoRsSdyp/Y8cgton0JIC9N6rvavppYh0FwHWmyibQOxAMwDsQD0Ihq83q6DkWM3vdQA1Kn40B7
LYTotM5F1LYJfg4YHRiA041no9AC0GOsOoW2vsLiKvT/D1aTf2Od30ezAB9bevfsAAAAAElFTkSu
QmCC
)
D.
相关试题
-
已知在Rt△ABC中,∠C=90°,cosA=
,则sinB的值是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
55DEIB13RFOjUSfVZ2a9eL4BYBXpBOX9qe0AAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEnSURBVEhL1VbLDcMgDPVcHBgndzbhzCBcGaQH
RnGBUOLwM0Sq1EaKFEX28/OL/Qhg5wIAXLljKowAeu+7sX8C4NSliXI30gsaOFQlKTwHgSkGD+A9
elLTqV0AkuyNRNhvISJ4NDLPxjOATMMblEEDaa6mAO2RFT4K2TiFo6tuA6y1KVYLQKFf6XkGgPGT
kjauUonJyWIMELWQSDq478IRqEcWFCBRLst1T26W6aUFgtDzFipxGrUii6kGHAAr4grAqhfkYmvu
03OoRsSdyp/Y8cgton0JIC9N6rvavppYh0FwHWmyibQOxAMwDsQD0Ihq83q6DkWM3vdQA1Kn40B7
LYTotM5F1LYJfg4YHRiA041no9AC0GOsOoW2vsLiKvT/D1aTf2Od30ezAB9bevfsAAAAAElFTkSu
QmCC
)
D.
-
已知在Rt△ABC中,∠C=90°,cosA=
,则sinB的值是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACeSURBVDhP3ZLREQMhCESpjJ5oh2YohVIIoGcg
Xi4/l3xkZ/BG54l7q2AfdCegbAhorHM+NQAhAwCvd0BKjP4cyJAih1EkuZoqHc71C+AwdlYJ5Hih
u4D1YLyQrYYJmeKKLuJ2qEQJKtJ2KGPrsnuI42qH+V0Surqs5meoAGqM5Da7FiC0P5ZQAuG8dXaj
xxzCVL2gUc+jtr941dcBswdgFekEiSLONQAAAABJRU5ErkJggg==
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACoSURBVDhPzZC7DQQhDAVdFwHlkNMJMYWQUsgG
LuUdxl4JpN07ILqRLFmYkT+EB4hoLez/hBRW+HeZM7zsKBGrPS7JFdFn8J232u3/lplNVGrckUdq
3B1bkY4HOw/Y4XzWRfbkBmcPsgMSStBxKGi18U0e96ZSSk+SI7h09fxdZmT/dO0+gXafZOnUJ9MY
7jXvHFpRur93npl+XcmBXDqTBel+LAtrMvABvDKYogJWgwAAAAAASUVORK5CYII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEJSURBVEhL1ZW7FcMgDAA1FwXjuGcTagahZRAX
jKJIAjsYCPjTxPceDgFzFnJQADsAwKkm98q1Yps8w1sEwciYNBPyYOKEIKDZF1Gf5krHXBAjxtxl
grkqKIhO39kCE9Hp2zkoiA41zWn33RSgX5IZljw0EBD1NsB7Lx2rAJVdpT8SyCstBfkTUyQpit8C
zoXGYgfHHCy0kKMoBRIyfU/tuJg5CFarEJQdRNDS3MlRPBIwjwVXoIdtCbreRCDXB/yrIB8a2Wt1
+mo6Aqo62uUi0lagmlYwqUA14xxUJ6/HTwE/+WYOCjoVqGYsIOQ470ltmQpmeZgIUjW+9hbKv7HJ
b4CZb2HC6wWIH0ezAB/CDIJsAAAAAElFTkSuQmCC
)
D.
-
在△ABC中,已知∠C=90°,sinB=
,则cosA的值是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACzSURBVDhPxZLhDYUwCISZjJ1Yh2UYhVGQ2vbZ
IlV/GF8To9EDTr4DuznwkkDZEMCgXCRTUx8hRsim+2t/dtGoAVNtH2uhUBSMDYWyEUflwsPQoplF
ro7KOe1BGQ1+phOBu5x8hA5qjPEvSkVfUthB6iGyeQvWBXP31ygm9/+YzDY5wXRQp0R1gaMmloTF
LvDWVHK5GCGEVjOyoHmkOBGUFGfb7LF7EJgJ1M0ecpMXqD+iuQGH/94XKjmE8gAAAABJRU5ErkJg
gg==
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACySURBVDhPtZLdDYAwCISZjJ1Yh2UYhVGwtLb2
h6Y+KMbENPTuhA/sUPB1gxojGMmjO1goowHsGpSNWHYKSZrYND2hhRAaq/tGDUJdqKBBCHKw+cUi
adOgDr8ZZxhmfVRYN/P5sgKLaAb1LJjDfyETC1j30eNUdiFG6Cx4pe+FKHVMnvLtbpm0xAasFuV2
42LXkLvusBWWcFAZ/RZ6ISp7DTleIOc3OminjDO0/y1rVW4nF4pt3heVopGcAAAAAElFTkSuQmCC
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACuSURBVDhPvVTREcUgCGMydmIdlmEURqFWnie0
WH/ap9cfLxdiEgu2WfA2QI0RjGTyphHKaAArgLIRy4qhURObtl2OEEJjPedWAKEgqgAIQRd2/dAp
7WLU5pq1huT1luGezOthFSMqD8ZZ4cOnIkdZ+nw8o/f180GMwmFU4oAUeRbaAO6/X40s9PUet3dj
tCtpmLRdbOh9EVYWXAOeGGbDh4b2YDCUNj67f4e1+pEcHk3jHzFeNekAAAAASUVORK5CYII=
)
D.
-
已知在Rt△ABC中,∠C=90°,cosA=
,则sinB的值是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
55DEIB13RFOjUSfVZ2a9eL4BYBXpBOX9qe0AAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEnSURBVEhL1VbLDcMgDPVcHBgndzbhzCBcGaQH
RnGBUOLwM0Sq1EaKFEX28/OL/Qhg5wIAXLljKowAeu+7sX8C4NSliXI30gsaOFQlKTwHgSkGD+A9
elLTqV0AkuyNRNhvISJ4NDLPxjOATMMblEEDaa6mAO2RFT4K2TiFo6tuA6y1KVYLQKFf6XkGgPGT
kjauUonJyWIMELWQSDq478IRqEcWFCBRLst1T26W6aUFgtDzFipxGrUii6kGHAAr4grAqhfkYmvu
03OoRsSdyp/Y8cgton0JIC9N6rvavppYh0FwHWmyibQOxAMwDsQD0Ihq83q6DkWM3vdQA1Kn40B7
LYTotM5F1LYJfg4YHRiA041no9AC0GOsOoW2vsLiKvT/D1aTf2Od30ezAB9bevfsAAAAAElFTkSu
QmCC
)
D.
-
(2005•包头)已知在Rt△ABC中,∠C=90°,cosA=
,则sinB的值是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
55DEIB13RFOjUSfVZ2a9eL4BYBXpBOX9qe0AAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEnSURBVEhL1VbLDcMgDPVcHBgndzbhzCBcGaQH
RnGBUOLwM0Sq1EaKFEX28/OL/Qhg5wIAXLljKowAeu+7sX8C4NSliXI30gsaOFQlKTwHgSkGD+A9
elLTqV0AkuyNRNhvISJ4NDLPxjOATMMblEEDaa6mAO2RFT4K2TiFo6tuA6y1KVYLQKFf6XkGgPGT
kjauUonJyWIMELWQSDq478IRqEcWFCBRLst1T26W6aUFgtDzFipxGrUii6kGHAAr4grAqhfkYmvu
03OoRsSdyp/Y8cgton0JIC9N6rvavppYh0FwHWmyibQOxAMwDsQD0Ihq83q6DkWM3vdQA1Kn40B7
LYTotM5F1LYJfg4YHRiA041no9AC0GOsOoW2vsLiKvT/D1aTf2Od30ezAB9bevfsAAAAAElFTkSu
QmCC
)
D.
-
已知在Rt△ABC中,∠C=90°,cosA=
,则sinB的值是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACeSURBVDhP3ZLREQMhCESpjJ5oh2YohVIIoGcg
Xi4/l3xkZ/BG54l7q2AfdCegbAhorHM+NQAhAwCvd0BKjP4cyJAih1EkuZoqHc71C+AwdlYJ5Hih
u4D1YLyQrYYJmeKKLuJ2qEQJKtJ2KGPrsnuI42qH+V0Surqs5meoAGqM5Da7FiC0P5ZQAuG8dXaj
xxzCVL2gUc+jtr941dcBswdgFekEiSLONQAAAABJRU5ErkJggg==
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACoSURBVDhPzZC7DQQhDAVdFwHlkNMJMYWQUsgG
LuUdxl4JpN07ILqRLFmYkT+EB4hoLez/hBRW+HeZM7zsKBGrPS7JFdFn8J232u3/lplNVGrckUdq
3B1bkY4HOw/Y4XzWRfbkBmcPsgMSStBxKGi18U0e96ZSSk+SI7h09fxdZmT/dO0+gXafZOnUJ9MY
7jXvHFpRur93npl+XcmBXDqTBel+LAtrMvABvDKYogJWgwAAAAAASUVORK5CYII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEJSURBVEhL1ZW7FcMgDAA1FwXjuGcTagahZRAX
jKJIAjsYCPjTxPceDgFzFnJQADsAwKkm98q1Yps8w1sEwciYNBPyYOKEIKDZF1Gf5krHXBAjxtxl
grkqKIhO39kCE9Hp2zkoiA41zWn33RSgX5IZljw0EBD1NsB7Lx2rAJVdpT8SyCstBfkTUyQpit8C
zoXGYgfHHCy0kKMoBRIyfU/tuJg5CFarEJQdRNDS3MlRPBIwjwVXoIdtCbreRCDXB/yrIB8a2Wt1
+mo6Aqo62uUi0lagmlYwqUA14xxUJ6/HTwE/+WYOCjoVqGYsIOQ470ltmQpmeZgIUjW+9hbKv7HJ
b4CZb2HC6wWIH0ezAB/CDIJsAAAAAElFTkSuQmCC
)
D.
-
已知在Rt△ABC中,∠C=90°,sinB=
,则COSA的值为( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
55DEIB13RFOjUSfVZ2a9eL4BYBXpBOX9qe0AAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEvSURBVEhL1VTJDcQgDHRdPCgnfzrhTSF8KSQP
SvFicnCZAFpFq0WKRNAwjMcHILMAAGc+ugo9Au6cxf4JgVPJE+UK0WMPvEF5XaJ9MFgaf5MMCbxz
mOCI3kgEae6zIUFjMoXzDQEpWAqhVOBQZa8fhWS30+EtGROM4pZTCsscBAJrbcRqASj0HvdUxvUi
6VUGD+wNjEoOFQ1BMC6PG8P/RVY8tYWXSUVOENPWNFcKpSDYtUAQmg2h11xNsKSC82CaoGfiEkEP
zJ0HtXPTh8OVaVx5NsPyJbdA9hJBPoGq5qnFcUWfJlBoHUUmc01wMjUEowk0VlAjKJwVBe19YNv4
wj1nIZ/IndQ+EHg0sp1A0x44JTEb/93SYhU04yubQEMFTnHN1Q/lpVL+fTMtKPgAkZz+NHVpDlkA
AAAASUVORK5CYII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAE0SURBVEhL1ZY9DsMgDIV9LgaOk52bMHMQVg6S
gaO4mNIA5jdROzRSpaiCz88P/BTAzgMAuPOjrTAC9P7vrv0TgFPZE+Uq0RseOFTXpvAeDC4Za4D3
6IuaTt0FFJu9kQj3WyCCRyPT3XgGSDK8QRk8kCY3BWiP5PBxiaVbOHp4G2CtjWu1ABT6jO8zANKR
Fm3kUlHJW8UYQF5ILDqoZ+EI0klFCYiSr+GqNzfDdGqBIPS8BWZO4xapmHqwAixN3AHsZkEqtpc+
vYRqTLxT+bN2fOU2aT8ClAkkTZUHXFirgCaOJRDPgBLSALxzVcV4lScq1h6w6Vu3wFbwDLwHqPzo
n+ukBZp9hW5xH4YAp9rZ77G6AHK+Ct9gJAvjnJ+cSqa1gzNuZX2MTz3YnKX+B8bu5q/kwQut7P6b
b/Nk4wAAAABJRU5ErkJggg==
)
D.
-
已知在Rt△ABC中,∠C=90°,cosA=
,则sinB的值是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
55DEIB13RFOjUSfVZ2a9eL4BYBXpBOX9qe0AAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEnSURBVEhL1VbLDcMgDPVcHBgndzbhzCBcGaQH
RnGBUOLwM0Sq1EaKFEX28/OL/Qhg5wIAXLljKowAeu+7sX8C4NSliXI30gsaOFQlKTwHgSkGD+A9
elLTqV0AkuyNRNhvISJ4NDLPxjOATMMblEEDaa6mAO2RFT4K2TiFo6tuA6y1KVYLQKFf6XkGgPGT
kjauUonJyWIMELWQSDq478IRqEcWFCBRLst1T26W6aUFgtDzFipxGrUii6kGHAAr4grAqhfkYmvu
03OoRsSdyp/Y8cgton0JIC9N6rvavppYh0FwHWmyibQOxAMwDsQD0Ihq83q6DkWM3vdQA1Kn40B7
LYTotM5F1LYJfg4YHRiA041no9AC0GOsOoW2vsLiKvT/D1aTf2Od30ezAB9bevfsAAAAAElFTkSu
QmCC
)
D.
-
已知在Rt△ABC中,∠C=90°,cosA=
,则sinB的值是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
55DEIB13RFOjUSfVZ2a9eL4BYBXpBOX9qe0AAAAASUVORK5CYII=
)
B.![](https://img.xintiku.com/upload/f7/fb/f7fb515942c96fe9955019b17658779c.png)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEnSURBVEhL1VbLDcMgDPVcHBgndzbhzCBcGaQH
RnGBUOLwM0Sq1EaKFEX28/OL/Qhg5wIAXLljKowAeu+7sX8C4NSliXI30gsaOFQlKTwHgSkGD+A9
elLTqV0AkuyNRNhvISJ4NDLPxjOATMMblEEDaa6mAO2RFT4K2TiFo6tuA6y1KVYLQKFf6XkGgPGT
kjauUonJyWIMELWQSDq478IRqEcWFCBRLst1T26W6aUFgtDzFipxGrUii6kGHAAr4grAqhfkYmvu
03OoRsSdyp/Y8cgton0JIC9N6rvavppYh0FwHWmyibQOxAMwDsQD0Ihq83q6DkWM3vdQA1Kn40B7
LYTotM5F1LYJfg4YHRiA041no9AC0GOsOoW2vsLiKvT/D1aTf2Od30ezAB9bevfsAAAAAElFTkSu
QmCC
)
D.
-
已知在Rt△ABC中,∠C=90°,cosA=
,则sinB的值是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACfSURBVDhP3VNBDsAgCOvL+BPf4TM8hacwmZnD
uc2L2WEmxphgi22BTxYWFpg4gVysx6wUyg6g7KeCWuX884JdpNChbtZTrJVePNg6pzgauzsDdI6w
KFEtMEUoEs+hgoeKTboITSlKUsJUuxcm1KGMvwi6jHD9hfKbWV0/9WmiMBfiku27udhHY5yJhhCd
55DEIB13RFOjUSfVZ2a9eL4BYBXpBOX9qe0AAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEnSURBVEhL1VbLDcMgDPVcHBgndzbhzCBcGaQH
RnGBUOLwM0Sq1EaKFEX28/OL/Qhg5wIAXLljKowAeu+7sX8C4NSliXI30gsaOFQlKTwHgSkGD+A9
elLTqV0AkuyNRNhvISJ4NDLPxjOATMMblEEDaa6mAO2RFT4K2TiFo6tuA6y1KVYLQKFf6XkGgPGT
kjauUonJyWIMELWQSDq478IRqEcWFCBRLst1T26W6aUFgtDzFipxGrUii6kGHAAr4grAqhfkYmvu
03OoRsSdyp/Y8cgton0JIC9N6rvavppYh0FwHWmyibQOxAMwDsQD0Ihq83q6DkWM3vdQA1Kn40B7
LYTotM5F1LYJfg4YHRiA041no9AC0GOsOoW2vsLiKvT/D1aTf2Od30ezAB9bevfsAAAAAElFTkSu
QmCC
)
D.