Math, asked by amitspamm03, 15 hours ago

(v) If sin q + cos q = √ 3 , then prove that tan q + cot q = 1.​

Answers

Answered by MaheswariS
0

\textbf{Given:}

\mathsf{sin\,\theta+cos\,\theta=\sqrt{3}}

\textbf{To prove:}

\mathsf{tan\,\theta+cot\,\theta=1}

\textbf{Solution:}

\textsf{Consider,}

\mathsf{sin\,\theta+cos\,\theta=\sqrt{3}}

\textsf{Squaring on bothsides, we get}

\mathsf{(sin\,\theta+cos\,\theta)^2=3}

\mathsf{sin^2\theta+cos^2\theta+2\,sin\,\theta\,cos\,\theta=3}

\mathsf{1+2\,sin\,\theta\,cos\,\theta=3}

\mathsf{2\,sin\,\theta\,cos\,\theta=2}

\implies\mathsf{sin\,\theta\,cos\,\theta=1}-----(1)

\mathsf{Now}

\mathsf{tan\,\theta+cot\,\theta}

\mathsf{=\dfrac{sin\,\theta}{cos\,\theta}+\dfrac{cos\,\theta}{sin\,\theta}}

\mathsf{=\dfrac{sin^2\theta+cos^2\theta}{sin\,\theta\,cos\,\theta}}

\mathsf{Using\;(1)}

\mathsf{=\dfrac{1}{1}}

\implies\boxed{\mathsf{tan\,\theta+cot\,\theta=1}}

\textbf{Find more:}

Prove that 1-sin^2x/1+cotx-cos^2x/1+tanx=sinxcossx

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