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May 26, 2013

# Homework Help: Pre-Calc Help!!!!!!!!

Posted by Amanda on Tuesday, April 17, 2012 at 10:21pm.

Evaluate the expression under the given conditions.

sin2(theta), sin(theta)=1/7(theta) in Q2

• Pre-Calc Help!!!!!!!! - Steve, Wednesday, April 18, 2012 at 5:51am

sin 2θ = 2sinθ cosθ

sinθ = 1/7
cosθ = -√48/7 = -4√3/7

sin2θ = 2 * 1/7 * (-4√3/7) = -8√3/49

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