Q26 of 35 Page 3

Prove that =


L.H.S =
        =
        =
        =
        =
        = R.H.S

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sin2x + 2sin4x + sin6x = 4cos2x sin4x

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cot4x(sin5x + sin3x) = cotx(sin5x – sin3x)

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Prove that = tan4x

28
Prove that = tan