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Some examples Type:1 (1) (sin5A-sin3A)/(...

Some examples Type:1 (1) `(sin5A-sin3A)/(cos5A+cos3A)=tanA` (2)` (sin3x+sinx)sinx+(cos3x-cosx)cosx=0` (3) Prove that `cot4x(sin5x+sin3x)=cotx(sin5x-sin3x)`

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Prove that cot4x(sin5x+sin3x)=cot x(sin5x-sin3x)

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