The trigonometric value is $\"\"$ .

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Rewrite value as $\"\"$ .

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$\"\"$

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Since $\"\"$ .

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$\"\"$

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Solution:

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$\"\"$ .

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Step 1:

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The trigonometric value is $\"\"$ .

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Rewrite value as $\"\"$ .

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$\"\"$

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Since $\"\"$ .

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$\"\"$

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Step 2:

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Rewrite $\"\"$ .

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$\"\"$ .

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Since $\"\"$ .

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$\"\"$

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Rewrite $\"\"$ .

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$\"\"$ .

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Since $\"\"$ .

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$\"\"$

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Step 3:

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$\"\"$

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$\"\"$

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Solution:

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$\"\"$ .

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Step 1:

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The trigonometric value is $\"\"$ .

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Rewrite value as $\"\"$ .

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$\"\"$

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Since $\"\"$ .

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Substitute the values of $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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Step 1:

\

The trigonometric value is $\"\"$ .

\

Rewrite value as $\"\"$ .

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$\"\"$

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Since $\"\"$ .

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Substitute the values of $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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Step 1:

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The trigonometric expression is $\"\"$ .

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Rewrite $\"\"$ .

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$\"\"$

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Since $\"\"$ .

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$\"\"$

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Step 2:

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Rewrite $\"\"$ .

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$\"\"$

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Substitute above expression in $\"\"$ .

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$\"\"$

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$\"\"$

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