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Mathematics, 05.02.2020 01:55 jessicathegr823

Verify the identity:

cos 4x + cos 2x = 2 - 2 sin2 2x - 2 sin2 x

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Verify the identity:

cos 4x + cos 2x = 2 - 2 sin2 2x - 2 sin2 x...

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