$\"\"$

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The trigonometric expression is $\"\"$ .

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Rewrite the expression as $\"\"$ .

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Find the value of denominator.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Use the periodicity of the $\"\"$ : $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$ .

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$\"\"$

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Find the value of $\"\"$ .

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$\"\"$ .

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Sum and difference identity $\"\"$ .

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$\"\"$

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The trivial identities are $\"\"$

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Find $\"\"$ values. \ \

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$\"\"$

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Half angle identify is $\"\"$ .

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$\"\"$

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$\"\"$ . \ \ $\"\"$

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Half angle identify is $\"\"$ .

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$\"\"$

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$\"\"$ .

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Substitute $\"\"$ and $\"\"$ , $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Rationalize the fraction.

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$ .