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

  1. Approximate the coordinates of point R.

  2. How could you represent the exact coordinates of point R?

  3. Show that the Pythagorean Identity works for this angle.

(0.3420, 0.9397)

(cos70°, sin70°)

sin²θ + cos²θ = 1