In any triangle ,

MATHEMATICS · Single correct · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

In any triangle ABCABC, a2sin⁡(B−C)sin⁡B+sin⁡C+b2sin⁡(C−A)sin⁡C+sin⁡A+c2sin⁡(A−B)sin⁡A+sin⁡B=\frac{a^2\sin(B-C)}{\sin B+\sin C}+\frac{b^2\sin(C-A)}{\sin C+\sin A}+\frac{c^2\sin(A-B)}{\sin A+\sin B}= (1) a+b+ca+b+c (2) a+b−ca+b-c (3) a−b+ca-b+c (4) 00

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