precalculus
posted by ama .
sinθ=12/13, θ lies in quadrant II. Find the exact value of sin2θ, cos 2θ, tan2θ

5 , 12, 13 right triangle
sin T = 12/13
cos T = 5/13
tan T = 12/5
use identities to get functions of the angle doubled
eg
sin 2T = 2 sin T cos T = 2(12/13)(5/13)