Question

If a,b,c are the sides of triangle find k

Answer 1

Answer:

(a + b + c)(b + c - a) = k.bc (b + c)2 - a2 = k.bc b2 + c2 + 2bc - a2 = kbc 2bc + 2bccos A = kbc k = 4cos2 A2

Step-by-step explanation:

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