For Exercises 61 and 62, refer to the following figures.
Chapter 8, Problem 61(choose chapter or problem)
For Exercises 61 and 62, refer to the following figures. Figure A shows an equilateral triangle inscribed in the unit circle. Figure B shows a regular pentagon inscribed in the unit circle. In both figures, the coordinates of the point P are (x, 0).For Figure A, show that (PA1)(PA2)(PA3) 1 x3
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