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Prove that: (cos7x-cos8x)/(1+2cos5x)=cos...

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

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

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

To prove (cos5x+cos4x)/(1-2cos3x)=-cos2x-cos x

Prove that: (cos7x+cos5x)/(sin7x-sin5x)=cotx

To prove (cos5x+cos4x)/(1-2cos3x) = -cos2x-cosx

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

Prove that :(cos7x+cos5x)/(sin7x-sin5x)=cot x

Prove that (cos7x+cos5x)/(sin7x-sin5x)=cot x

Prove that, (cos7x+cos5x)/(sin7x-sin5x)=cotx

int(cos7x-cos8x)/(cos2x-cos3x)dx