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If A + B + C = 180^(@), prove that tan...

If A + B + C = `180^(@)`, prove that
`tan ""(A)/(2) tan ""(B)/(2) + tan ""(B)/(2) tan""( C)/(2) +tan""(C)/(2) tan"" (A)/(2) = 1`

Text Solution

Verified by Experts

The correct Answer is:
tan `(B)/(2) = 1`
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