Chapter 1.6, Problem 24E

Answer number 7

Graph the equation for values of x between 0° and 360° in multiples of 15°. y = cos(2x) The x y-coordinate plane is given. The curve begins at the point (0°, 1), goes down and right, crosses the x-axis at x = 90°, changes direction at the point (180°, −1), goes up and right, crosses the x-axis at x = 270°, and ends at the point (360°, 1).   The x y-coordinate plane is given. The curve begins at the point (0°, 2), goes down and right, crosses the x-axis at x = 90°, changes direction at the point (180°, −2), goes up and right, crosses the x-axis at x = 270°, and ends at the point (360°, 2).   The x y-coordinate plane is given. The curve begins at the origin, goes down and right, changes direction at the point (90°, −1), goes up and right, crosses the x-axis at x = 180°, changes direction at the point (270°, 1), goes down and right, and ends at the point (360°, 0).   The x y-coordinate plane is given. The curve begins at the point (0°, 1), goes down and right, crosses the…

The temperature of a chemical reaction oscillates between a low of 20∘C and a high of 100∘C. The temperature is at its lowest point when t=0 and completes one cycle over a five-hour period.   Find the period, the amplitude, and the midline of the graph