Prove that
sin8ϴ - cos8ϴ =(1 – 2cos2ϴ) (1- 2sin2ϴ.cos2ϴ).
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Prove that sin8ϴ - cos8ϴ =(1 – 2cos2ϴ) (1- 2sin2ϴ.cos2ϴ).
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