If sina +sinb= x, cosa+cosb=y then sin(a+b)= a xy b x+y c 2xy/x^2- y^2 d 2xy/a^2+b^2 - Maths - Trigonometric Functions

Question

If sina +sinb= x, cosa+cosb=y then sin(a+b)= a xy b x+y c 2xy/x^2-
y^2 d 2xy/a^2+b^2

Brijendra P. · Accepted Answer

Refer the similar link:
https://www meritnation
com/ask-answer/question/if-sina-sinb-acosa-cosb-b-then-show-that-cos-a-b-b2-a2/trigonometric-functions/7010571

After finding the value of of cos you can find out sin

If sina +sinb= x, cosa+cosb=y then sin(a+b)= a. xy b. x+y c. 2xy/x^2- y^2 d. 2xy/a^2+b^2