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TrigonometryCalculators and Trigonometric FunctionsCalculators can be used to compute the values of trig functions at angles that are not necessarily special ( 0º, 30º = π/6, 45º = π/4, 60º = π/6, 90º = π/2). Always make sure your calculator is set at the right mode (DEG or RAD) Note: On some scientific calculators, to obtain the value of π you press the π key. On others, you press the EXP. Before continuing on, test your calculator to find which key gives you the value of π = 3.14159265359… ExerciseExerciseNote that for any x, If you are given the value of a trig function you can find the angle by using the inverse of the trig function.
Example Find θ between By a calculator, This is in the first quadrant: To get the value in the second quadrant we calculate θ = π – 0.3047 =2.837 Exercise 6. << Trigonometry Functions on General Angles | Trigonometry Index | Graphs of Trig Functions >> |