How do I find all the solutions to sin4x=cos3x, [0, 2pi[ ?
Another way of doing the question (which is how I picked up the missing solution):
Since (supplementary angle formula), the equation can be re-written as: .
Case 1: (where n = -m) and you have the solutions given by Soroban. Note that these solutions include .
Case 2: Since it can also be said that
.