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Prove that sqrt ((1-cos theta )/( 1+cos...

Prove that ` sqrt ((1-cos theta )/( 1+cos theta ) ) = cosec theta -cot theta , 0le theta le 90 ^(@) `

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The correct Answer is:
`= (1)/(sin theta ) +( cos theta )/( sin theta ) =cosec theta +cot theta =RHS
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