Prove that sin^4x + cos^4x =1- 2sin^2x cos^2x
Please prove it....
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Answer:
Step-by-step explanation:
L.H.S:
Sin⁴x + Cos⁴x
= (Sin²x)² + (Cos²x)²
= (Sin²x + Cos²x)² - 2*Sin²x*Cos²x
= 1 - 2Sin²xCos²x.
= R.H.S
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