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Mathematics, 18.03.2021 02:10 gomez1718

Prove that:
Sin x - Sin 3x + Sin 5x - Sin 7x
= Cot 2x
Cos x-Cos 3x - Cos 5x + Cos 7x​

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Prove that:
Sin x - Sin 3x + Sin 5x - Sin 7x
= Cot 2x
Cos x-Cos 3x - Cos 5x + Cos 7x​...
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