Math, asked by mathiasabor, 11 months ago

Montrer que : cos4x − sin4x + 2cos2xsin2x = 1.

Answers

Answered by goyalvikas78

1

Hey!

cos4x − sin4x + 2cos2xsin2x = 1

cos4x − sin4x + sin4x = 1

cos4x = 1

Cos4x = cos0°

4x = 2nπ ± 0 , n ∈ Z

x = nπ/2 ± 0, n ∈ Z

Hope it help

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