trygonometria Zuza: sinx+sin3x+sin5x=0 Pomoże ktoś?

ICSP: sinx + sin3x + sin5x = 0 (sin5x + sinx) + sin3x = 0

	5+1		5−1
2sin		cos		+ sin3x = 0
	2		2

2sin3xcos2x + sin3x = 0 sin3x(2cos2x + 1) = 0 sin3x = 0 v 2cos2x +1 = 0 reszta twoja.