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July 4, 2015

Homework Help: math

Posted by unknown on Sunday, November 20, 2011 at 5:17pm.

tan theta= 15/8 and pi< theta<3pi/2

a. Sin(- theta)
b. cos2theta
c. sin( theta - 3pi/4)
d. cos(theta/2)

can someone explain to me how do you find the exact value for these?

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