Question

plz answer this question​

Answer 1

Answer:

sin(A+B)=sin(A)cos(B)-cos(A)sin(B)

cos(2x)=1-2sin^2(x)

sin(2x)=2sin(x)cos(x)

sin(3x)=sin(x+2x)

sin(x)cos(2x)+cos(x)sin(2x)

sin(x){1-2sin^2(x)}+2cos^2(x){1-sin^2(x)}

sin(x)-2sin^3(x)-2sin^3(x)

3sin(x)-4sin^3(x)