Chemistry, asked by sumitrajsharma110, 2 months ago

कौन सी धातु विद्युत का सुचालक होती है​

Answers

Answered by kelly324141
3

Answer:

what do you mean by सुचालक

Answered by Anonymous
1

Correct Question :-

Prove that :- \mathsf{\;\dfrac{1 - cos\theta}{1 + cos\theta}}=\mathsf{(cosec\theta - cot\theta)^2}

To Prove :-

\mathsf{\;\dfrac{1 - cos\theta}{1 + cos\theta}}=\mathsf{(cosec\theta - cot\theta)^2}

Proof :-

\qquadL.H.S\\

\mathsf\pink{{ \:  \:  \:  \:   \:  \:  \:  \:  \: \: \;\dfrac{1 - cos\theta}{1 + cos\theta}}}\\

\mathsf{ \:  \:  \:  \:   \:  \:  \:  \:  \: \:\::\implies \dfrac{(1 - cos\theta)(1 - cos\theta)}{(1 + cos\theta)(1 - cos\theta)}}\\

\qquad\sf{\red{\boxed{\sf{(a + b)(a - b) = a² - b²}}}}

\mathsf{ \:  \:  \:  \:   \:  \:  \:  \:  \: \:\::\implies (1 - cos\theta)(1 + cos\theta) = 1 - cos^2\theta}\\

\mathsf{ \:  \:  \:  \:   \:  \:  \:  \:  \: \:\::\implies \dfrac{(1 - cos\theta)^2}{1 - cos^2\theta}}\\

\qquad\;\;\textsf{ \red{\boxed{\mathsf{1 - cos^2\theta = sin^2\theta}}}}

\mathsf{ \:  \:  \:  \:   \:  \:  \:  \:  \: \:\::\implies \dfrac{(1 - cos\theta)^2}{sin^2\theta}}\\

\mathsf{ \:  \:  \:  \:   \:  \:  \:  \:  \: \:\::\implies \bigg[\dfrac{1 - cos\theta}{sin\theta}\bigg]^2}\\

\mathsf{ \:  \:  \:  \:   \:  \:  \:  \:  \: \:\::\implies \bigg[\dfrac{1}{sin\theta} - \dfrac{cos\theta}{sin\theta}\bigg]^2}\\

\qquad\;\;\red{\boxed{\mathsf{\dfrac{1}{sin\theta} = cosec\theta}}}\\

\qquad\;\;\red{\boxed{\mathsf{\dfrac{cos\theta}{sin\theta} = cot\theta}}}\\

\mathsf\pink{{ \:  \:  \:  \:   \:  \:  \:  \:  \: \:\::\implies (cosec\theta - cot\theta)^2}}\\

\qquadR.H.S\\

\therefore\:\underline{\textsf{  \textbf{Proved..!}}}.\\

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