$\"\"$

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The trigonometric expression is $\"\"$ .

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The above expression fits the formula for $\"\"$ .

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Let the angles $\"\"$ .

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The angle is $\"\"$ .

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$\"\"$ (Write Pythagorean theorem)

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

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$\"\"$ (Apply rule of exponents)

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$\"\"$ (Apply square root each side)

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The function $\"\"$ .

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The function $\"\"$ . $\"\"$

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The angle is $\"\"$ .

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$\"\"$ (Write Pythagorean theorem)

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

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$\"\"$ (Subtract $\"\"$ from each side)

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$\"\"$ (Apply square root each side)

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The function $\"\"$ . $\"\"$

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$\"\"$ (Write original expression)

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

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$\"\"$ (Apply difference formula: $\"\"$ )

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

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$\"\"$ (Simplify)

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$\"\"$ (Apply LCM rule: $\"\"$ ) $\"\"$

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The solution is $\"\"$ .