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What is the relationship between s(t) = sin t and the unit circle? What is the relationship between c(t) = cos t and the unit circle? 3. What are the standard reference angles? In degrees: In radians: You should know the values of the six trig functions at any angle that has a standard reference angle. That means that you do not need a calculator to find these values. This knowledge should let you bound or estimate the values at other angles.  4. Sketch the angle. Evaluate the function at the given angle without a calculator. (e.g. cos 90o = 0) cos  EMBED Equation.3  sin  EMBED Equation.3  tan  EMBED Equation.3  tan EMBED Equation.3  cos  EMBED Equation.3  sin EMBED Equation.3  sin 135o tan 300o cos 180o III. Graphs of Trigonometric Functions 1. Within your group, do quick sketches of at least 2 periods of the six basic trig functions (by hand). 2. Give the amplitude, period, & phase shift. Sketch the graph. a)  EMBED Equation.DSMT4   b)  EMBED Equation.DSMT4   c)  EMBED Equation.DSMT4  3. State the rule of a function of the form f(t) = A sin( bt + c) or g(t) = A cos( bt + c) for the graph.  (see #18-28, sec 1.5) IV. Other 1. What is your favorite trig identity? 2. 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