# MATH ANALYSIS

posted by
**anonymous**
.

I need help solving this problem algebraically, but I need to learn step by step!!

Thanks so much

cos 2x=cos x

How do I do it?

posted by
**anonymous**
.

I need help solving this problem algebraically, but I need to learn step by step!!

Thanks so much

cos 2x=cos x

How do I do it?