# Math Help - 0.8 = 0.8cos(t) - 1.2sin(2t)

1. ## 0.8 = 0.8cos(t) - 1.2sin(2t)

0.8 = 0.8cos(t) - 1.2sin(2t)

How would I solve this?

2. Originally Posted by kmjt
0.8 = 0.8cos(t) - 1.2sin(2t)

How would I solve this?
This is trig, not calculus.

Either way you should use the identity $\sin(2t) = 2\sin(t) \cos(t)$

$2.4 \sin(t) \cos(t) - 0.8\cos(t) + 0.8 = 0$

This will factor