APPENDIXA

Solutions to “You’ve Got Problems”

All the answers to the problems that you found in the “You’ve Got Problems” sidebars throughout the book are listed here, organized by chapter.

Chapter 1

1. Using the relationship that 180° corresponds to π radians, set up the proportion to arrive at .

2. You know that sin(2A) = 2sin(A)cos(A). Use the Pythagorean identity sin2(A) + cos2(A) = 1 to solve for the value of becomes so and . Therefore, ...

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