Find the value of x given a tangent line to a circle

The video tutorial explains the concept of a tangent line and its properties, including its perpendicular relationship with the radii. It demonstrates how to use the Pythagorean theorem to calculate the value of x in a right triangle formed by the tangent. The tutorial further simplifies the expression for x, showing how to break down the calculation into simpler components and find the exact value using square roots.

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