$\"\"$

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The trigonometric expression is $\"\"$ .

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Let $\"\"$ then $\"\"$ .

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Substitute $\"\"$ in the trignometric expression.

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$\"\"$ .

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$\"\"$ .

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Apply pythagorean identity : $\"italic$ $\"\"$ .

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$\"\"$ .

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Substitute the value $\"\"$ in above expression.

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$\"\"$ .

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$\"\"$

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The algebraic expression is $\"\"$ .

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