Question

Help plsss

Answer 1

Angle \[\theta \] is in quadrant II and \[\sin \theta = 5/13\]. Determine an exact value for \[\cos2 \theta \]

Answer 2

easy....

Answer 3

use cos2theta=1-2sin^2theta

Answer 4

so, 1-2(5/13)^2

Answer 5

I hope you can get the answer now

Answer 6

=p umm thanks?

Answer 7

My pleasure.... :)

Answer 8

o wait isn't it supposed to be 1-2(12/13)^2?

Answer 9

and then you get a final answer of 119/169