### Home > CCA2 > Chapter 12 > Lesson 12.2.2 > Problem12-114

12-114.

Use the Pythagorean Identity to find the missing coordinate of this point on the unit circle: $\left(?,\frac{4}{5}\right)$.

At any point on the unit circle, the corresponding right triangle has a hypotenuse of $1$.

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

For any right triangle, $a^² + b^² = c^²$.