$\"\"$

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Multiply top and bottom by ( 1- sinx)

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$\"\"$

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Where 1 -sin^2x = cos^2x

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$\"\"$

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Where u = cosx

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du = - sinx

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$\"\"$

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$\"\"$

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$\"\"$

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Substitute u value

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$\"\"$

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Where 1/cosx = secx

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The solution is $\"\"$

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