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Prove: (sinx+cosx)/cos^3x=tan^3x+tan^2x+...

Prove: `(sinx+cosx)/cos^3x=tan^3x+tan^2x+tanx+1`

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Prove that: (sinx +sin3x)/(cosx+cos3x)=tan2x

(sinx+sin3x)/(cosx+cos3x) = tan2x

Prove that: (sinx+sin3x)/(cosx+cos3x)=tan2x

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Prove the following : (sinx +sin3x)/(cos x + cos 3x)= tan 2x .

int tan(pi/4-x)/(cos^2xsqrt(tan^3x+tan^2x+tanx))dx

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tanx + tan2x + tan3x = tanx tan2x tan3x