$\"\"$

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Trigonometric function is $\"\"$ .

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Here $\"\"$ .

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Reciprocal Identity : $\"\"$ .

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$\"\"$ .

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Reduction Identiy : $\"\"$ .

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$\"\"$ .

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

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$\"\"$

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Thus, the statement is true.

\

$\"\"$

\

The statement is true.