$\"\"$

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The trigonometric expression is $\"Syntax$ .

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

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$\"\"$

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Pythagorean identity : $\"\"$ .

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$\"\"$

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

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$\"\"$

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Thus, $\"\"$ .

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$\"\"$

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$\"\"$ .