Question

oops sorry i didn't complete the question.
it should be:

solve the equation:
cos 3x = cos 2x
0˚< x < 360˚

Answer 1

when does just cos(x) = 0?

Answer 2

the obvious answeer is x = 0

but unfortunately there are other solutions

Answer 3

ok... an easy solution is to graph the 2 curves and find the points of intersection in the given domain.

The algebraic solution is tedious.

Answer 4

here is a graphical solution

the graph is in radians and not degrees, sorry about that

Answer 5

Thank you!!!