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(2010•天津)sin30°的值等于( ) A.1 B. C. D.
(2010•天津)sin30°的值等于( )
A.1
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232441953414449/SYS201310212324419534144012_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232441953414449/SYS201310212324419534144012_ST/1.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232441953414449/SYS201310212324419534144012_ST/2.png)
考点分析:
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,则sin(54°+A)的值是( )
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C.
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D.
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C.
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D.
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