The unit circle, with a radius of one unit, is useful for calculating function values at common angles like 0°, 30°, 45°, 60°, and 90°.įor graphing sine or cosine, we find the y-coordinate using the function’s value for a given x-coordinate. To graph a trigonometric function, we start with key points and connect them. Tangent represents the ratio of the opposite side to the adjacent side. Cosine represents the ratio of the adjacent side to the hypotenuse. Sine represents the ratio of the side opposite an angle to the hypotenuse. These functions are defined based on ratios of sides in a right triangle. The main trigonometric functions are sine (sin), cosine (cos), tangent (tan), cosecant (csc), secant (sec), and cotangent (cot). Trigonometry functions are essential to understand before proceeding. How to Graph a Trig Function with Examples
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