## Essentials of TrigonometryFollowing the same presentation of and features for Trigonometry for College Students, Seventh Edition, this text was built by beginning with the right angle definition and applications involving the solution of right triangles. |

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AABC addition laws algebraic amplitude angle of elevation approximate arc length called central angle chapter complex numbers coordinates cos(a cos2 cosecant cotangent decimal places defined degree measure distance domain Draw Evaluate exact values EXAMPLE exponential exponents expression Find the exact frame fundamental identities given angle graphing calculator height horizontal inverse functions inverse trigonometric functions law of cosines law of sines magnitude mathematics mi/h Multiply nearest tenth negative Objective period plane plotting points polar polar-form PROBLEM SET Prove Pythagorean theorem Quadrant quadratic formula radian measure radius ratio real numbers reciprocal rectangular reference angle revolution right triangle roots rotation secant Show shown in Figure significant digits similar triangles Simplify sin2 sine curve sine function Sketch Solution Solve standard position Substitute tangent curve terminal side trigonometric equations trigonometric substitution unit circle variable vector vertical WORDS write Xscl=l