Math, asked by Anonymous, 1 year ago

⭐Prove that ......
➡1/ cosec A - cot A = 1+cos A / sin A ❗❗❗
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Answers

Answered by Grimmjow
12

Given : \frac{1}{CosecA - CotA}

\frac{1}{\frac{1}{SinA} - \frac{CosA}{SinA}}

\frac{1}{\frac{1 - CosA}{SinA}}

\frac{SinA}{1 - CosA}

Multiplying and Dividing with (1 + CosA)

\frac{SinA(1 + CosA)}{(1 - CosA)(1 + CosA)}

We know that a² - b² = (a + b)(a + b)

⇒ (1 - CosA)(1 + CosA) = 1 - Cos²A

\frac{SinA(1 + CosA)}{1 - Cos^2A}

We know that Sin²A + Cos²A = 1

⇒ 1 - Cos²A = Sin²A

\frac{SinA(1 + CosA)}{Sin^2A}

\frac{1 + CosA}{SinA}

Answered by kapil913
15
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