Math, asked by Ramya852007, 7 months ago

Prove that sina+ sinB/sin A-sin B = tan (A + B)/2.Cos[A-B/2)

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Answered by vk8091624

1

Answer:

See the answer below... Explanation: sinA+sinB=x ⇒2⋅sin(A+B2)⋅cos(A −B2)=x ...(1). cosA+cosB=y ⇒2⋅cos(A+B2)⋅cos( A−B2)=y .

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