Sin43 x * cos 23x-sin23x * cos43 x =1

Question

Sin43 x * cos 23x-sin23x * cos43 x =1

Answer 1

Sin (43x-23x)  =1
sin 20x = 1
20x = p/2 + 2pk, k ∈ Z
x= p/40  + 1/10 pk, k ∈ Z.