Find the exact value by using a half-angle identity.sin 

A.   
B. -  
C. -  
D.  

Answer: D

Mathematics

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A. h = 
B. h = 
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A. x = 60 B. x = 80 C. x = 35 D. x = 70

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A. -18 B. 14 C. -22 D. 12

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