Question

General solution for cos(5x)-cos(2x)=0

Answer 1

Simplifying cos(5x) + cos(2x) = 0
 (5x) cos * 5x + cos(2x) = 0 
 5cos * x + cos(2x) = 0 Multiply cos * x 5cosx + cos(2x) = 0
(2x) 5cosx + cos * 2x = 0
 5cosx + 2cos * x = 0 Multiply cos * x 5cosx + 2cosx = 0  5cosx + 2cosx = 7cosx 7cosx = 0 Solving 7cosx = 0 Solving for variable 'c'. cosx = 0 Simplifying cosx = 0

Hope this helps!

In short your answer is 0