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In a DeltaABC, if cos C = (sin A)/(2 sin...

In a `Delta`ABC, if cos C = `(sin A)/(2 sin B)`, show that the triangle is isosceles.

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The correct Answer is:
`b^(2) - c^(2) = 0 rArr b^(2) = c^(2) rArr b = c `
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