CBSE Class 11-science Answered
prove
Asked by | 14 Sep, 2012, 11:31: AM
Expert Answer
It is known that a/sin A = b/sin B = c/sin C.
Let a/sin A = b/sin B = c/sin C = k
Or, sin A = a/k, sin B = b/k and sin C = c/k (1)
Now, a cos A + b cos B + c cos C
Hence, proved
Answered by | 14 Sep, 2012, 01:00: PM
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