Trigonometry, 3rd Edition

AAS case. See Angle-Angle-Side case

Abscissa. See x-coordinates

Absolute value function, properties of, 556, 564, 567

Accuracy, in solving right triangles, 49–50

and ambiguous triangle cases, 377–378, 380–381

defined, 5

evaluating functions for, 85–86

Acute triangles

defined, 372

and Law of Cosines, 387–388

and Law of Sines, 374–375

Addition

of complex numbers, 441

of functions, 589–591

of vectors, 407, 409–411

Addition of ordinates, for graphing sums of functions, 217–221

Algebraic signs, of trigonometric functions, 93–96

Algebraic techniques

for one-to-one functions, 601–602

for solving trigonometric equations, 345–346

for vector operations, 407–409

Alternate exterior angles, 17–18

Alternate interior angles, 17–18

Altitude

and Law of Cosines, 387–388

and Law of Sines, 374–375

Ambiguous cases, oblique triangles, 377–381

Amplitude. See also Graphing

defined, 186

in harmonic motion, 193–195

of non-sinusoidal functions, 226, 232

of sinusoidal functions, 186–188, 232

summary table, 232

Angle-Angle-Side case, for solving oblique triangles, 373, 375–376, 393

Angle measures

degree measure, 4–6

finding with calculator, 52–53, 104–105

finding with geometry, 17–19

finding with inverse functions, 321, 325, 328, 337

radian measure, 130–135

Angle of rotation, finding, 667–669

Angles

acute, 5, 85–86

between vectors, 422–424

central, 130–131

classification of, 5

corresponding, 17–24

coterminal, ...