Hi sry for the previous double post, below is another porblem i faced:
given: 0 <= x < pi ; 0 <= y; < pi
sin^2x = sin^2y
(sinx + siny )( sinx - siny ) = 0
thus, how to get from above equation to form below 2 statements?
x = y+2pi( k ) //where is the pi & k come from?
x = -y+2pi( k )