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Chapter 6: Q. 70 (page 381)
Use a calculator to find the approximate value of each expression rounded to two decimal places.
The approximate value of the given expression is 0.38.
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Use a calculator to find the approximate value of each expression rounded to two decimal places:
The Cable Cars of San Francisco At the Cable Car Museum you can see the four cable lines that are used to pull cable cars up and down the hills of San Francisco. Each cable travels at a speed of 9.55 miles per hour, caused by a rotating wheel whose diameter is 8.5 feet. How fast is the wheel rotating? Express your answer in revolutions per minute.
Nautical Miles A nautical mile equals the length of arc subtended by a central angle of 1 minute on a great circle† on the surface of Earth. See the figure. If the radius of Earth is taken as 3960 miles, express 1 nautical mile in terms of ordinary, or statute, miles.
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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Find the exact value of each expression. Do not use a calculator.
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