sinA+sinB=a & cosA+cosB=bProve that- sin(A+B)=(2ab)/(a²+b²)
Rajani Mani , 8 Years ago
Grade 11
Trigonometry> sinA+sinB=a & cosA+cosB=b Prove that- sin...
1 AnswersVikas TU
Last Activity: 8 Years ago
Apply sinc + sind and
cosc + cosd forulae:
and divide them u would get the relation of tan in terms of a and b.
And then after find sin(A+B) taking lhs and prove it for RHS.
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