1) -sinx(cosx-1)+sinx(1+cosx) 2sinx
y¹=--------------------------------------=--------------
(cosx-1)² (cosx-1)²
2) -2sin2x sin2x
y¹=--------------= - -----------
2√cos2x √cos2x
3) y¹=3sin²6x *cos6x *6 = 18 sin²6x cos6x
4)y¹=3sin²(5x²) *cos(5x²) *(10x)=30x *sin²(5x²) *cos(5x²)