circle in the figure. In Exercise 3, t increases in increments of 7/4; in Exercise 4, t increases in increments of 7/6. (See Exer- cises 21 and 22 in Section 6.1.) CONCEPTS 1. Let P(x, y) be the terminal point on the unit circle deter- mined by 1. Then sin t = cos = 3. 4. and tan t = 2. If P(x, y) is on the unit circle, then x² + y? = So for all we have sin't + cos't = SKILLS 3-4 - Evaluating Trigonometric Functions Find sin t and cos t for the values of t whose terminal points are shown on the unit

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