In the given figure, PR is a tangent to the unit circle. Find the length of tangent PR.

c o s e c θ

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c o s θ

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c o t θ

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t a n θ

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Solution

The correct option is D $t a n θ$
In the figure given, consider $△$ OPR
$tan θ = \frac{P R}{O P} = \frac{P R}{1}$
$⟹ P R = tan θ$

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