How do I do cos(θ)=sin(θ+20) when I'm solving for θ?

Question

0

450

1

Guest Dec 16, 2014

+118723

+10

Best Answer

The co in cosine stands for complementary. Complementary angles add up to 90 degrees

$$\\cos\theta=sin(90-\theta)\\
so\\
90-\theta=\theta+20$$

and you can finish it. :)

Melody Dec 16, 2014

Melody · Answer 1 · 2014-12-16T03:40:43

The co in cosine stands for complementary. Complementary angles add up to 90 degrees

$$\\cos\theta=sin(90-\theta)\\
so\\
90-\theta=\theta+20$$

and you can finish it. :)