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在△ABC中,∠A与∠B是锐角,sinA=,cotB=,那么∠C=________度.
试题详情
在△ABC中,∠A与∠B是锐角,sinA=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEvSURBVEhL1VTJDcQgDHRdPCgnfzrhTSF8KSQP
SvFicnCZAFpFq0WKRNAwjMcHILMAAGc+ugo9Au6cxf4JgVPJE+UK0WMPvEF5XaJ9MFgaf5MMCbxz
mOCI3kgEae6zIUFjMoXzDQEpWAqhVOBQZa8fhWS30+EtGROM4pZTCsscBAJrbcRqASj0HvdUxvUi
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zJ0HtXPTh8OVaVx5NsPyJbdA9hJBPoGq5qnFcUWfJlBoHUUmc01wMjUEowk0VlAjKJwVBe19YNv4
wj1nIZ/IndQ+EHg0sp1A0x44JTEb/93SYhU04yubQEMFTnHN1Q/lpVL+fTMtKPgAkZz+NHVpDlkA
AAAASUVORK5CYII=
)
,cotB=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEnSURBVEhL1VbLDcMgDPVcHBgndzbhzCBcGaQH
RnGBUOLwM0Sq1EaKFEX28/OL/Qhg5wIAXLljKowAeu+7sX8C4NSliXI30gsaOFQlKTwHgSkGD+A9
elLTqV0AkuyNRNhvISJ4NDLPxjOATMMblEEDaa6mAO2RFT4K2TiFo6tuA6y1KVYLQKFf6XkGgPGT
kjauUonJyWIMELWQSDq478IRqEcWFCBRLst1T26W6aUFgtDzFipxGrUii6kGHAAr4grAqhfkYmvu
03OoRsSdyp/Y8cgton0JIC9N6rvavppYh0FwHWmyibQOxAMwDsQD0Ihq83q6DkWM3vdQA1Kn40B7
LYTotM5F1LYJfg4YHRiA041no9AC0GOsOoW2vsLiKvT/D1aTf2Od30ezAB9bevfsAAAAAElFTkSu
QmCC
)
,那么∠C=________度.
相关试题
-
在△ABC中,∠A与∠B是锐角,sinA=
,cotB=
,那么∠C=________度.
-
在△ABC中,∠A与∠B是锐角,sinA=
,cotB=
,那么∠C=________度.
-
(1999•北京)在△ABC中,∠C=90°,如果sinA=
,那么cotB的值等于( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACzSURBVDhPzVPRDYUwCGQydmIdlmEURuFRqe9R
RP0x5jUxmnocV+4KdrPgIYCyIYDBeEgWUm8hRsim27Z/OyhjwFTnzygUqoBMKNS1+FWeaEgUUyxy
KBrrMAdlNPiKbgCuctFRGNQY6ylGxT6kMoNWQ/XmKbMuPHd908Xm/bbIzYNdx9GLnKr1SDEoH3eJ
YrY7DAp68lR2DHNv5BEALeXlJDCpX2PWKrgHXDEIVQ352v1poj4Fo+dtI1hHZwAAAABJRU5ErkJg
gg==
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACrSURBVDhPvVLRDUQhCGMydmIdlmEUR+Hw0Huo
eN6HORNjYppS2oIeDtwDFEYFAL/IWhp1GyFK4TOOdYCQkuRqDFCUsVED6YwbthCqQFTuAox0WfMt
NsxLfBgF54BvDEKzhsKK3SB753UvZrFL9Tzik2AQ2v8q65nhXqOcyaOPZg0aeu1ygFlOLDsGo6Za
1M2IJ8EMMBQ2AXgP14utmJOThzWPPvwAWJP5Q5ovyRTjHxF58r8AAAAASUVORK5CYII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACzSURBVDhPxZLhDYUwCISZjJ1Yh2UYhVGQ2vbZ
IlV/GF8To9EDTr4DuznwkkDZEMCgXCRTUx8hRsim+2t/dtGoAVNtH2uhUBSMDYWyEUflwsPQoplF
ro7KOe1BGQ1+phOBu5x8hA5qjPEvSkVfUthB6iGyeQvWBXP31ygm9/+YzDY5wXRQp0R1gaMmloTF
LvDWVHK5GCGEVjOyoHmkOBGUFGfb7LF7EJgJ1M0ecpMXqD+iuQGH/94XKjmE8gAAAABJRU5ErkJg
gg==
)
D.
-
在△ABC中,∠C=90°,sinA=
,那么cotB等于( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAE0SURBVEhL1ZY9DsMgDIV9LgaOk52bMHMQVg6S
gaO4mNIA5jdROzRSpaiCz88P/BTAzgMAuPOjrTAC9P7vrv0TgFPZE+Uq0RseOFTXpvAeDC4Za4D3
6IuaTt0FFJu9kQj3WyCCRyPT3XgGSDK8QRk8kCY3BWiP5PBxiaVbOHp4G2CtjWu1ABT6jO8zANKR
Fm3kUlHJW8UYQF5ILDqoZ+EI0klFCYiSr+GqNzfDdGqBIPS8BWZO4xapmHqwAixN3AHsZkEqtpc+
vYRqTLxT+bN2fOU2aT8ClAkkTZUHXFirgCaOJRDPgBLSALxzVcV4lScq1h6w6Vu3wFbwDLwHqPzo
n+ukBZp9hW5xH4YAp9rZ77G6AHK+Ct9gJAvjnJ+cSqa1gzNuZX2MTz3YnKX+B8bu5q/kwQut7P6b
b/Nk4wAAAABJRU5ErkJggg==
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEnSURBVEhL1VbLDcMgDPVcHBgndzbhzCBcGaQH
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elLTqV0AkuyNRNhvISJ4NDLPxjOATMMblEEDaa6mAO2RFT4K2TiFo6tuA6y1KVYLQKFf6XkGgPGT
kjauUonJyWIMELWQSDq478IRqEcWFCBRLst1T26W6aUFgtDzFipxGrUii6kGHAAr4grAqhfkYmvu
03OoRsSdyp/Y8cgton0JIC9N6rvavppYh0FwHWmyibQOxAMwDsQD0Ihq83q6DkWM3vdQA1Kn40B7
LYTotM5F1LYJfg4YHRiA041no9AC0GOsOoW2vsLiKvT/D1aTf2Od30ezAB9bevfsAAAAAElFTkSu
QmCC
)
D.1
-
在△ABC中,∠C=90°,sinA=
,那么cotB等于( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAE0SURBVEhL1ZY9DsMgDIV9LgaOk52bMHMQVg6S
gaO4mNIA5jdROzRSpaiCz88P/BTAzgMAuPOjrTAC9P7vrv0TgFPZE+Uq0RseOFTXpvAeDC4Za4D3
6IuaTt0FFJu9kQj3WyCCRyPT3XgGSDK8QRk8kCY3BWiP5PBxiaVbOHp4G2CtjWu1ABT6jO8zANKR
Fm3kUlHJW8UYQF5ILDqoZ+EI0klFCYiSr+GqNzfDdGqBIPS8BWZO4xapmHqwAixN3AHsZkEqtpc+
vYRqTLxT+bN2fOU2aT8ClAkkTZUHXFirgCaOJRDPgBLSALxzVcV4lScq1h6w6Vu3wFbwDLwHqPzo
n+ukBZp9hW5xH4YAp9rZ77G6AHK+Ct9gJAvjnJ+cSqa1gzNuZX2MTz3YnKX+B8bu5q/kwQut7P6b
b/Nk4wAAAABJRU5ErkJggg==
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEnSURBVEhL1VbLDcMgDPVcHBgndzbhzCBcGaQH
RnGBUOLwM0Sq1EaKFEX28/OL/Qhg5wIAXLljKowAeu+7sX8C4NSliXI30gsaOFQlKTwHgSkGD+A9
elLTqV0AkuyNRNhvISJ4NDLPxjOATMMblEEDaa6mAO2RFT4K2TiFo6tuA6y1KVYLQKFf6XkGgPGT
kjauUonJyWIMELWQSDq478IRqEcWFCBRLst1T26W6aUFgtDzFipxGrUii6kGHAAr4grAqhfkYmvu
03OoRsSdyp/Y8cgton0JIC9N6rvavppYh0FwHWmyibQOxAMwDsQD0Ihq83q6DkWM3vdQA1Kn40B7
LYTotM5F1LYJfg4YHRiA041no9AC0GOsOoW2vsLiKvT/D1aTf2Od30ezAB9bevfsAAAAAElFTkSu
QmCC
)
D.1
-
(1999•北京)在△ABC中,∠C=90°,如果sinA=
,那么cotB的值等于( )
-
在△ABC中,若|sinA-
|+(
cotB)2=0,则∠C=________.
-
在△ABC中,∠C=90°,a,b分别是∠A,∠B所对的两条直角边,c是斜边,则有( )
A.sinA=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAjCAYAAACgj+sEAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC8SURBVDhP3VTbDYAgDLzJuhPrsAyjMMpJBUTC
Q4h/oMTEtL0+7gpuHmza80AHTysgEK9xbUtK0d5SXkbeysxBIwut/25yRHCG6OF3/G8HhZeV8MH2
cYBY5ow0wAgxFV13Z4Z2BDUyDVa+OoIjiv7mZ23xr2hnstoM3YDyFfkK6RzNTKIauWboWIEI6qG8
tHCX2PuXakertqiNkSZQpxNzB3QheIa3OTGltIeA0J3wFKfZXlqc4L/BrYBsI1yXQgcfnFRefwAA
AABJRU5ErkJggg==
)
B.cosB=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAjCAYAAACgj+sEAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADMSURBVDhP3VTBEcQgCKQyerIdm7EUS9mTED0T
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ojmekyB2BFgt6dsSVIJhR6rmEsbqiAIjGp6KglGdFNz/oMGOgFsuTtLtl3d/eqWv3jffSnTB7Csc
bbB43ymseq+4/Rx+XqEOkpbaH6A6RB3I2yDdiNoDcy+KEiYDYxJEnq159LaGEPq1crydHXVbM1qd
mdo/tMYHxUsFiqVz1y4AAAAASUVORK5CYII=
)
C.tanA=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAjCAYAAACgj+sEAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADnSURBVDhP3VTbDcQgDMtk2Yl1WIZRGMUlhPK6
cIWf6nSoVVVwQhxsCIeDDvH4u4DgCETyOoTgQC589KSQjvBMYB8LIMClQAOvXZLMDSwzkoBR47t9
CNGD2SdIN6y5skzRs5F93rElo7EcrZ1IyolIj0Fats+g0h30QVbAoZh+UUtKdu8Vui9yqEq1FDdo
aZAQmwrtj6rjIApNPng4yBYgEnkoZ+iSqNaFW0epzbPkb3nrVx2Xrdn9Lx2XTTStSteWAVrOYLkv
Fs3lTN1Z3BhKei5HwJXLwkDtPkrET056x3wvqnWnHMFcvxDxwEXhNuYAAAAASUVORK5CYII=
)
D.cotB=
-
在△ABC中,∠C=90°,a,b分别是∠A,∠B所对的两条直角边,c是斜边,则有( )
A.sinA=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAjCAYAAACgj+sEAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC8SURBVDhP3VTbDYAgDLzJuhPrsAyjMMpJBUTC
Q4h/oMTEtL0+7gpuHmza80AHTysgEK9xbUtK0d5SXkbeysxBIwut/25yRHCG6OF3/G8HhZeV8MH2
cYBY5ow0wAgxFV13Z4Z2BDUyDVa+OoIjiv7mZ23xr2hnstoM3YDyFfkK6RzNTKIauWboWIEI6qG8
tHCX2PuXakertqiNkSZQpxNzB3QheIa3OTGltIeA0J3wFKfZXlqc4L/BrYBsI1yXQgcfnFRefwAA
AABJRU5ErkJggg==
)
B.cosB=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAjCAYAAACgj+sEAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADMSURBVDhP3VTBEcQgCKQyerIdm7EUS9mTED0T
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ojmekyB2BFgt6dsSVIJhR6rmEsbqiAIjGp6KglGdFNz/oMGOgFsuTtLtl3d/eqWv3jffSnTB7Csc
bbB43ymseq+4/Rx+XqEOkpbaH6A6RB3I2yDdiNoDcy+KEiYDYxJEnq159LaGEPq1crydHXVbM1qd
mdo/tMYHxUsFiqVz1y4AAAAASUVORK5CYII=
)
C.tanA=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAjCAYAAACgj+sEAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADnSURBVDhP3VTbDcQgDMtk2Yl1WIZRGMUlhPK6
cIWf6nSoVVVwQhxsCIeDDvH4u4DgCETyOoTgQC589KSQjvBMYB8LIMClQAOvXZLMDSwzkoBR47t9
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aZAQmwrtj6rjIApNPng4yBYgEnkoZ+iSqNaFW0epzbPkb3nrVx2Xrdn9Lx2XTTStSteWAVrOYLkv
Fs3lTN1Z3BhKei5HwJXLwkDtPkrET056x3wvqnWnHMFcvxDxwEXhNuYAAAAASUVORK5CYII=
)
D.cotB=
-
在△ABC中,∠C=90°,a,b分别是∠A,∠B所对的两条直角边,c是斜边,则有( )
A.sinA=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAjCAYAAACgj+sEAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC8SURBVDhP3VTbDYAgDLzJuhPrsAyjMMpJBUTC
Q4h/oMTEtL0+7gpuHmza80AHTysgEK9xbUtK0d5SXkbeysxBIwut/25yRHCG6OF3/G8HhZeV8MH2
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tHCX2PuXakertqiNkSZQpxNzB3QheIa3OTGltIeA0J3wFKfZXlqc4L/BrYBsI1yXQgcfnFRefwAA
AABJRU5ErkJggg==
)
B.cosB=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAjCAYAAACgj+sEAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADMSURBVDhP3VTBEcQgCKQyerIdm7EUS9mTED0T
wWheN+eMD2d22QUBwuahTTwaIQUCUbkhTWNcFHJkPOC/CkBG5IB5fHSEHMFP4YvZZkntJATJQy7H
ojmekyB2BFgt6dsSVIJhR6rmEsbqiAIjGp6KglGdFNz/oMGOgFsuTtLtl3d/eqWv3jffSnTB7Csc
bbB43ymseq+4/Rx+XqEOkpbaH6A6RB3I2yDdiNoDcy+KEiYDYxJEnq159LaGEPq1crydHXVbM1qd
mdo/tMYHxUsFiqVz1y4AAAAASUVORK5CYII=
)
C.tanA=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAjCAYAAACgj+sEAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADnSURBVDhP3VTbDcQgDMtk2Yl1WIZRGMUlhPK6
cIWf6nSoVVVwQhxsCIeDDvH4u4DgCETyOoTgQC589KSQjvBMYB8LIMClQAOvXZLMDSwzkoBR47t9
CNGD2SdIN6y5skzRs5F93rElo7EcrZ1IyolIj0Fats+g0h30QVbAoZh+UUtKdu8Vui9yqEq1FDdo
aZAQmwrtj6rjIApNPng4yBYgEnkoZ+iSqNaFW0epzbPkb3nrVx2Xrdn9Lx2XTTStSteWAVrOYLkv
Fs3lTN1Z3BhKei5HwJXLwkDtPkrET056x3wvqnWnHMFcvxDxwEXhNuYAAAAASUVORK5CYII=
)
D.cotB=