APPENDIX D - Trigonometry - D Exercises: 19

Work Step by Step

Given: $-\frac{3\pi}{4}$ rad $=-135^{\circ}$ The standard position of an angle occurs when we place its vertex at the origin of a coordinate system and its initial side on the positive x-axis. A positive angle is obtained by rotating the initial side counterclockwise until it coincides with the terminal side. Likewise, negative angles are obtained by clockwise rotation.

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