Question

if sin alpha +sin beta = a and cos alpha + cos bita=b prove that sin(alpha +bita)= 2 Ab/a^2+b^2.​

Answer 1

✌️ ${\huge {\red {AHOY}}}$ ✌️

${\huge {\mathfrak {Answer :-}}}$

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Refer above in the attachment ⬆️

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Thanks..