Exam 3: Radian Measure

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θ  is a central angle that cuts off an arc of length s . Find the radius of the circle if θ = 10, s = 4  ft. If the answer needs rounding, round it to three significant digits. r = __________ ft

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Find the area of the sector formed by central angle θ = 10° in a circle of radius r = 4 m. If the answer needs rounding, round it to three significant digits. A = __________ m2

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Use the unit circle to find the six trigonometric functions of Use the unit circle to find the six trigonometric functions of   . ​ . ​

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Find the angular velocity associated with the given rpm. Round to the nearest tenth. 9.3 rpm ​

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Find the angular velocity associated with the given rpm. Round to the nearest radian  per minute. Find the angular velocity associated with the given rpm. Round to the nearest radian  per minute.   ​ ​

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Use the unit circle to find all values of θ  between 0 and 2 π  for which Use the unit circle to find all values of θ  between 0 and 2 π  for which   . .

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Find θ , if Find θ , if   and ​   and  θ in QI ​ and ​ Find θ , if   and ​   and  θ in QI ​ and  θ in QI ​

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A point is moving with uniform circular motion on a circular path of radius r . Find ω  if A point is moving with uniform circular motion on a circular path of radius r . Find ω  if   cm and   cm/sec. Round to the nearest tenth if necessary. ​ cm and A point is moving with uniform circular motion on a circular path of radius r . Find ω  if   cm and   cm/sec. Round to the nearest tenth if necessary. ​ cm/sec. Round to the nearest tenth if necessary. ​

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Use a calculator to find θ  to the nearest tenth of a degree, if  Use a calculator to find θ  to the nearest tenth of a degree, if     and ​   with θ  in QII ​  and ​ Use a calculator to find θ  to the nearest tenth of a degree, if     and ​   with θ  in QII ​ with θ  in QII ​

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Use the unit circle to find all values of θ  between 0 and 2 π  for which Use the unit circle to find all values of θ  between 0 and 2 π  for which   . .

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A cable railway had a 14-foot-diameter pulley to drive the cable (see the figure). In order to keep the cable cars moving at a linear velocity of 13 miles per hour, how fast would the pulley need to turn (in revolutions per minute)? (1 mi = 5,280 ft)​ A cable railway had a 14-foot-diameter pulley to drive the cable (see the figure). In order to keep the cable cars moving at a linear velocity of 13 miles per hour, how fast would the pulley need to turn (in revolutions per minute)? (1 mi = 5,280 ft)​   ​  If the answer needs rounding, round it to the nearest tenth. __________ rpm ​ If the answer needs rounding, round it to the nearest tenth. __________ rpm

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The figure below is a model of the Ferris wheel. The diameter of the wheel is 189 feet, and one complete revolution takes 14 minutes. Find the linear velocity of a person riding on the wheel. Give your answer in miles per hour and round to the nearest hundredth. The figure below is a model of the Ferris wheel. The diameter of the wheel is 189 feet, and one complete revolution takes 14 minutes. Find the linear velocity of a person riding on the wheel. Give your answer in miles per hour and round to the nearest hundredth.   ​ __________ mph ​ __________ mph

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Through how many radians does the minute hand of a clock turn during a 6-minute period?

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Find θ , if Find θ , if   and ​   with  θ in QI ​   __________° and ​ Find θ , if   and ​   with  θ in QI ​   __________° with  θ in QI ​ Find θ , if   and ​   with  θ in QI ​   __________° __________°

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Use a calculator to find Use a calculator to find   Please round the answer to the nearest ten-thousandth. Please round the answer to the nearest ten-thousandth.

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Find the area of the sector formed by central angle Find the area of the sector formed by central angle    in a circle of radius    m. ​  in a circle of radius Find the area of the sector formed by central angle    in a circle of radius    m. ​  m. ​

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Find the exact value of sin 300º. ​

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Graph the unit circle using parametric equations with your calculator set to degree mode. Use a scale of 5. Trace the circle to find the sine and cosine of the angle to the nearest ten-thousandth. 225° ​

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Point P moves with angular velocity  ω on a circle of radius r . Find the distance s traveled by the point in time t . Point P moves with angular velocity  ω on a circle of radius r . Find the distance s traveled by the point in time t .   ​  If the answer needs rounding, round it to three significant digits. __________ ft ​ If the answer needs rounding, round it to three significant digits. __________ ft

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If the distance to the sun is approximately 93 million miles, and, from the earth, the sun subtends an angle of approximately 0.5°, estimate the diameter of the sun to the nearest 10,000 miles. ​

(Multiple Choice)
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