Question

Sin A + Cos A the whole square is equal to 1 + 2 Sin A cos I

Answer 1

= (Sin A + Cos A)² 

= Sin²A + Cos²A + 2 (Sin A × Cos A)

(Identity - Sin²A + Cos²A = 1)

= 1 + 2 (Sin A × Cos A)

Hence Proved.
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Answer 2

here is ur answer.......