7-64. A 70° angle is drawn for you in the unit circle below. a. Approximate the coordinates of point R. VAnswer (a) (0.3420, 0.9397) b. How could you represent the exact coordinates of point R? Answer (b) (cos 70°, sin 70") c. Show that the Pythagorean Identity works for this angle Hint (c): sin 0 cos" 0= 1

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