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April 19, 2014

Homework Help: Pre-Calculus-check answers

Posted by Lucy on Sunday, August 31, 2008 at 12:03am.

If cos theta = 0.8 and 270<theta<360, find the exact value of sin 2theta

a) -0.96
b) -0.6
c) 0.96
d) 0.28

Answer: b

2) If csc theta = -5/3, and theta has its terminal side in Quadrant III, find the exact value of tan 2theta

a)24/25
b) 7/25
c) 24/7
d) -7/25

Thanks

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