Math, asked by KimJihyun, 5 months ago

(sinA+cosA)²+(sinA-cosA)²=2

Answers

Answered by Anonymous

3

Proof:

L.H.S.

= (sinA + cosA)² + (sinA - cosA)²

= 2sin²A + 2sinAcosA + 2cos²A - 2sinAcosA

= 2 (sin²A + cos²A)

= 2

= R.H.S.

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