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Graphs of the Trig Functions Objective To use the graphs of the trigonometric functions. The Sine Function – y = sin x The Cosine Function – y = cos x The Tangent Function – y = tan x The Cosecant Function – y = csc x The Secant Function – y = sec x The Cotangent Function – y = cot x Periodic Function and Period •The graphs of the trig functions are periodic, meaning they repeat themselves every 180° or every 360°. We can find 0’s, maximum values, and minimum values easily. Since we know that sin 90° = 1, we also know that sin (90° + 360°k) = 1. Use the graph of the cosine function to find the values of q for which cos q = 1 Graph the sine curve in the interval -540° < q < 0° Assignment • Page 305 – 307 – # 19 – 45, 55, 59 – 61, 63