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(11)(cos7x-cos8x)/(1+2cos5x)...

(11)(cos7x-cos8x)/(1+2cos5x)

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Prove that: (cos7x-cos8x)/(1+2cos5x)=cos2x-cos3x

Prove that: (cos7x-cos8x)/(1+2cos5x)=cos2x-cos3x

int(cos7x-cos8x)/(1+2cos5x)dx

The value of the integral int(cos7x-cos8x)/(1+2cos5x)dx can be

The value of the integral int(cos7x-cos8x)/(1+2cos5x) dx can be

int(cos7x-cos8x)/(1+2cos 5x)dx=

The value of int (cos 7x-cos 8x)/(1+2 cos 5x)dx , is

If int((cos8x-cos7x)/(1+2cos5x))dx=(sin3x)/a-(sin2x)/b+c then the last digit of (a^b)^4 must be