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

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

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

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Evaluate: int(cos5x+cos4x)/(1-2cos3x)dx

Evaluate: int(cos5x+cos4x)/(1-2cos3x)dx

Evaluate: int(cos5x+cos4x)/(1-2cos3x)dx

Evaluate: int(cos5x+cos4x)/(1-2cos3x)dx

Evaluate: int(cos5x+cos4x)/(1-2cos3x)\ dx

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