$\"\"$

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The angle is $\"\"$ .

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$\"\"$ .

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$\"\"$

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Apply formula: $\"\"$

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$\"\"$

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Substitute the values : $\"\"$ . \ \

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$\"\"$

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$\"\"$ (Simplify)

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$\"\"$ .

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$\"\"$

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$\"\"$

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Apply formula: $\"\"$

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$\"\"$

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Substitute the values : $\"\"$ . $\"\"$

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$\"\"$ (Simplify)

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$\"\"$ .

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$\"\"$

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$\"\"$

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Apply formula: $\"\"$

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$\"\"$

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$\"\"$ ( $\"\"$ )

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$\"\"$ (Simplify)

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$\"\"$ .

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$\"\"$

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The exact values are $\"\"$ .