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Show that, 1/("cosec"-cotalpha)-1/(sin...

Show that,
`1/("cosec"-cotalpha)-1/(sinalpha)=1/(sinalpha)-1/("cosec"alpha+cotalpha).`

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The correct Answer is:
` therefore 1/("cosec"-cotalpha)-1/(sinalpha)=1/(sinalpha)-1/("cosec"alpha+cotalpha).`
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