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Chapter 6: Q. 10 (page 437)
Graph y = 3 sin(2x).
To find a graph of any function get x and y coordinates
solve for x
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Use a calculator to find the approximate value of each expression rounded to two decimal places.
Convert each angle in degrees to radians. Express your answer as a multiple of .
Approximating the Circumference of Earth Eratosthenes of Cyrene (276鈥�195 bc) was a Greek scholar who lived and worked in Cyrene and Alexandria. One day while visiting in
Syene he noticed that the Sun鈥檚 rays shone directly down a well. On this date 1 year later, in Alexandria, which is 500 miles due north of Syene he measured the angle of the Sun to be about 6.2 degrees. See the figure. Use this information to approximate the radius and circumference of Earth.
Find the exact value of each expression. Do not use a calculator.
In problems 13-20, is the point on the unit circle that corresponds to a real number . Find the exact values of the six trigonometric functions of .
.
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