Question 1007140: What is 5pi/4 radians in degrees?
45°
135°
225°
315°
A ship is traveling around the outside rim of an island surveying a good place to land. If it is 10 miles from a lighthouse at the center of the island and 45° from due north, how far has the ship traveled from the most northern tip of the island to the nearest tenth?
0.8 miles
4.5 miles
7.9 miles
12.5 miles
What are the sine, cosine, and tangent of 7pi/4 radians?
How long is the minute hand on a clock whose tip travels 15 cm from 1:15 to 1:30 to the nearest tenth?
10.1 cm
9.5 cm
6.0cm
0.2 cm
I don't know what the equation looks like.
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! What is 5pi/4 radians in degrees?
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pi rads = 180 degs
pi/4 rads = 45 degs
etc.
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In general, r rads = r*180/pi degs
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A ship is traveling around the outside rim of an island surveying a good place to land. If it is 10 miles from a lighthouse at the center of the island and 45° from due north, how far has the ship traveled from the most northern tip of the island to the nearest tenth?
It's traveled 45/360 = 1/8 of the circumference (if it traveled clockwise)
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What are the sine, cosine, and tangent of 7pi/4 radians?
Use a calculator or check the unit circle.
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How long is the minute hand on a clock whose tip travels 15 cm from 1:15 to 1:30 to the nearest tenth?
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That's 90 degs, 1/4 of the circumference
--> C = 2pi*r = 60 cm
Solve for r
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