Question

if sin B=1/2 show that 3cos B - 4cos square B = 0

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Answer 1

Answer:

sinB = 1/2

therefore cos B = root( 1-1/4) =root(3/4)

therefore

3×root(3/4) - 4×3/4 = 3root3 - 3

Answer 2

Answer:

I hope it will help u............