Silly question but uhh

1. Oct 20, 2006

Hollysmoke

How can I calculate cos ^2 (53)?

2. Oct 20, 2006

Staff: Mentor

What don't you understand? I assume you have a calculator and you realize that cos ^2 (53) = [cos(53)]squared.

3. Oct 20, 2006

andrevdh

Take the cos of the angle, $\cos$, then square the value obtained, $x^2$.

4. Oct 20, 2006

Hollysmoke

oh okay. Thanks.