SOLUTION: Find the exact value of each of the following. (Hint: you may need Angle Sum/Difference, Double Angle, or Half Angle Identities): a. cos(13pi/12) b. sin(pi/8) c. tan(2

Question 1036928: Find the exact value of each of the following. (Hint: you may need Angle Sum/Difference, Double Angle, or Half Angle Identities):
a. cos(13pi/12)

b. sin(pi/8)

c. tan(2X) if cosX = 5/6 and X is in Quadrant 1
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Find the exact value of each of the following. (Hint: you may need Angle Sum/Difference, Double Angle, or Half Angle Identities):
a. cos(13pi/12)

b. sin(pi/8)

c. tan(2X) if cosX = 5/6 and X is in Quadrant 1
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Look up "half angle formulas" on Wikipedia.
It's covered well there.
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