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9-54.
  1. A 70º angle is drawn for you in the unit circle below. Homework Help ✎

    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)

(cos(70°), sin(70°))

sin2(θ) + cos2(θ) = 1