Math, asked by sharmamithu2005, 7 months ago

Maths
(COSA + Sin A²+ (Cost-Sin A) ² = 2.
2.

Answers

Answered by adityashah0755

2

Step-by-step explanation:

LHS

(cosA + SinA)² + (cosA - sinA)²
(cos²A + sin²A + 2.cosA.sinA ) + (cos²A + sin²A - 2.cosA.sinA)
(1 + 2.cosA.sinA) + (1 - 2.cosA.sinA)
1 + 2.cosA.sinA + 1 - 2.cosA.sinA
1 + 1
2. RHS

Hence proved

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