Math, asked by Skylah, 3 months ago

(cosA + sinA)^2 + ( cosA- sinA) ^2 = 2 Prove

Answers

Answered by fireking9801

1

Answer:

(CosA+SinA)²+(CosA-SinA)²=2.

Taking The LHS:

=Cos²A+Sin²A+2CosASinA+Cos²A+Sin²A-2CosASinA

=1+2CosASinA+1-2CosASinA

=2.

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