Prove that sin^4x + cos^4x =1- 2sin^2x cos^2x
This is a mathematical question from internet. Please prove it for me.....
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Answer:
Step-by-step explanation:
sin⁴x + cos⁴x = (sin²x)² + (cos²x)²
= (sin²x+cos²x) - 2*sin²x*cos²x
= 1 - 2*sin²x*cos²x
= R.H.S
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