SOLUTION: Given sin 30°= 1/2, use trigonometric identities to find the exact value of: A: cos 60° B: cosē30° C: csc π/6 D: sec π/3

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Question 969094: Given sin 30°= 1/2, use trigonometric identities to find the exact value of:
A: cos 60°
B: cosē30°
C: csc π/6
D: sec π/3
Answer by Edwin McCravy(20060)   (Show Source): You can put this solution on YOUR website!
Given sin 30°= 1/2, use trigonometric identities to find the exact value of:
A: cos 60°
Use 

cos(60°) = sin(90°-60°) = sin(30°) =

B: cosē30°
Use  written as 

cosē30° = 1 - sinē30° = 1 -  = 1 -  =

C: csc π/6
Use

D:
sec π/3
Use  and the results of part C



Edwin
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