Question

Integration xsquare sin2xsin(π\2*cosx) /2x-π prove that =8/π

Answer 1

Answer:

Step-by-step explanation:

The formula of cos(x+y) is given as:

cos(x+y)=cos(x)cos(y)-sin(x)sin(y)

If y=x, then

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

Therefore, it can be clearly seen that

f(x)=-cos(2x)

Therefore,

f(pi/12)=-cos(2pi/12)=-cos(pi/6)

=-under-root(3)/2