$\"\"$

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The trigonometric expression is $\"\"$ and $\"\"$ .

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Consider $\"\"$ .

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$\"\"$ .

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Pythogorean theorem : $\"\"$ .

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$\"\"$

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Now find $\"\"$ .

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$\"\"$

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Thus, the simplified expression is $\"\"$ .

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$\"\"$

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The simplified expression is $\"\"$ .