Step 1:

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The cosine of the angle is $\"\"$ .

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$\"\"$ .

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Find the value of opposite side.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Step 2:

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$\"\"$

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$\"\"$

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$\"\"$ .

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Reciprocal identity : $\"\"$ .

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$\"\"$

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$\"\"$

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Step 3: \ \

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$\"\"$

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$\"\"$

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Reciprocal identity : $\"\"$ .

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$\"\"$

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$\"\"$

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Solution:

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$