Math, asked by vishanttarak, 9 months ago

Show that : cos^4theta -sin^4theta+1=2cos^2theta

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Answered by Anonymous

3

We Can Then Expand All Products And Add The Fractions To Simplify. 1/4 + Cos 2 Theta/2 + Cos^2 2 Theta/4 = 1/4 + 2 - 1/2 + (2 ...

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