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Home > INT3 > Chapter 10 > Lesson 10.3.3 > Problem 10-194


Use the Pythagorean Identity to determine the -coordinate of a point on the unit circle whose -coordinate is .

At any point on the unit circle, the corresponding right triangle has a hypotenuse of .

If you know the length of the vertical leg and the hypotenuse, how can you solve for the horizontal leg?

For any right triangle, .