Let us assume that, the real value , $\"\"$ .

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The point on the unit circle is $\"\"$ .

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Substitute the value $\"\"$ in $\"\"$ .

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$\"\"$

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

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$\"\"$ .

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Therefore,

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The value of $\"\"$ .

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The value of $\"\"$ .

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The value of $\"\"$ .