February 26, 2017

Homework Help: math(advanced algebra&trigonometry)

Posted by Rony on Saturday, March 27, 2010 at 1:06pm.

the expression cos4x cos3x + sin4x sin3x is equivalent to
which one of the following is the answer:
1) sinx
2) sin7x
3) cosx
4) cos7x

Answer This Question

First Name:
School Subject:

Related Questions

More Related Questions