### Home > CCA2 > Chapter 7 > Lesson 7.1.4 > Problem 7-64

7-64.

A 70° angle is drawn for you in the unit circle below. Homework Help ✎

Approximate the coordinates of point

*R*.How could you represent the exact coordinates of point

*R*?Show that the Pythagorean Identity works for this angle.

(0.3420, 0.9397)

(cos70°, sin70°)

sin²θ + cos²θ = 1