Given that $\"\"$

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Take R.H.S side

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tan2xcosecx

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We have formula of tan2x

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$\"\"$

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Substitute the formula of tan2x in tan2xcosecx

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$\"\"$

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$\"\"$

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$\"\"$

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Multiply the denominator with cosx

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Multiply the denominator with cosx

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$\"\"$

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$\"\"$

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$\"\"$

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Now take L.H.S side

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$\"\"$

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$\"\"$

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-sinx and +sinx will get cancelled

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$\"\"$

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So the obtained L.H.S is not equal to R.H.S

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The given trignometric identity is in correct

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