Grade 11Trigonometry
If sin A + sin B = a and cos A + cos B = b , show that sin(A+ B) = 2ab/a^2+b^2
1 Answer
Dhruvit Raithatha
Here's your answer:
http://www.askiitians.com/forums/Trigonometry/sinx-siny-a-and-coax-cos-y-b-show-that-sinx_149958.htm
You're welcome.
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