If A-B-C- prove that A-2-B-2-C-2-A-2B-2C-2-

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Trigonometric Equations

If A+B+C=π,...

Question

If $A + B + C = π$ , prove that $cot (A / 2) + cot (B / 2) + cot (C / 2) = cot (A / 2) cot (B / 2) cot (C / 2)$ .

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Solution

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Similar questions

If A + B + C = $π$ , prove that

$cot \frac{A}{2} + cot \frac{B}{2} + cot \frac{C}{2} = cot \frac{A}{2} cot \frac{B}{2} cot \frac{C}{2}$

A + B + C = π, cot \frac{A}{32} + cot \frac{B}{2} + cot \frac{C}{2} = cot \frac{A}{2} . cot \frac{B}{2} . cot \frac{C}{2}

a^{2} b^{2} + b^{2} c^{2} + c^{2} a^{2} \geq a b c (a + b + c)

Prove that

2a^2+2b^2+2c^2-2ab-2bc-2ca={(a-b)^2+(b-c)^2+(c-a)^2}

a^{4} + b^{4} + c^{4} \geq a^{2} b^{2} + b^{2} c^{2} + c^{2} a^{2}

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