Step 1:

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The functions are $\"\"$ .

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Find $\"\"$ .

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$\"\"$

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From trigonometric identities : $\"\"$ .

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$\"\"$

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Step 2:

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From figure (1),

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The circle is $\"\"$ and point is $\"\"$

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Rewrite the equation.

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$\"\"$ .

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It is in the form of $\"\"$ .

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Then $\"\"$ .

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Substitute the point $\"\"$ in a circle equation.

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$\"\"$

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Observe figure(1) :

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$\"\"$ .

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$\"\"$ .

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$\"\"$ lies in quadrant I.

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$\"\"$ .

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$\"\"$ .

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Step 3:

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From figure (2),

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The circle is $\"\"$ and point is $\"\"$

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Rewrite the equation.

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$\"\"$ .

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It is in the form of $\"\"$ .

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Then $\"\"$ .

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Substitute the point $\"\"$ in a circle equation.

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$\"\"$

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Observe figure(1) :

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The point lies in quadrant IV, then $\"\"$

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$\"\"$ .

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$\"\"$ .

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As $\"\"$ lies in quadrant IV.

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$\"\"$

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$\"\"$ .

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Step 4:

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Substitute the values of $\"\"$ in $\"\"$ equation.

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$\"\"$

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$\"\"$ .

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Solution :

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$\"\"$ .