Question

if A=B=45,verify that sin(A+B)=sinAcosB+cosAsinB

Answer 1

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Answer 2

A=B=45 (Given)

Sin(A+B)= Sin ACosB +CosA SinB..

=>Sin (45 +45) = Sin 45°Cos45° + Cos45° sin 45°

=>Sin (90°) =1 /√2 × 1/√2 + 1/√2 ×1/√2

=>1 = 1/2+1/2

=>1=2/2

=>1=1

hence proved!!