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Verify the Given Identity $\frac { \sin 5 x + \sin 3 x } { \cos 5 x + \cos 3 x } = \tan 4 x$

Question 95

Essay

Verify the given identity. $\frac { \sin 5 x + \sin 3 x } { \cos 5 x + \cos 3 x } = \tan 4 x$

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