$\"\"$

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The function is $\"\"$ , Quadrant II.

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$\"\"$ (Definition of cosine)

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$\"\"$

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Here x is negative in Quadrant ll and r is always positive, $\"\"$ . $\"\"$

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Using the Pythagorean theorem, To find the y.

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$\"\"$

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

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$\"\"$ \ \ Subtract 1 from each side.

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$\"\"$

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Take square root each side.

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$\"\"$

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$\"\"$

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Find the six trigonometric functions.

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Substitute these values $\"\"$ .

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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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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ . $\"\"$

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The angles are $\"\"$ , $\"\"$ , $\"\"$ , $\"\"$ , $\"\"$ , $\"\"$ .