Simplify each expression by first substituting values from the table of exact values and thensimplifying the resulting expression.     cos 3   60 0

Which of the following values of Y will the expression sin y 1– sin? y be undefined? None of these choices 41

The angle 0 made by a swinging pendulum and a vertical line is given by 0 = 0.8 cos (xt) radians, where time t is measured in seconds. What is the maximum (positive) angle made by the pendulum? (Use decimal notation. Give your answer to one decimal place.) maximum angle: radian How often does the pendulum return to this maximum ang (Give an exact answer. Use symbolic notation and fractions where needed.) pendulum returns to maximum angle: seconds

Find the exact value of the expression given below. cos 5x 12 5x COS (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression. Rationalize all denominators.)