Posted by David on Monday, October 26, 2009 at 10:44am.
Find an angle between 0 and 2Ð that is coterminal with given angle.
1. 7Ð /3
2. 10
3. 51Ð /2

math  MathMate, Monday, October 26, 2009 at 11:40am
The same applies as with angles measured in degrees.
Add or subtract 2π until the angle is between 0 and 2π.
1)
Since the angle is negative, we add 2π
7π/3 + 2π =π/3
The result is still negative, so we add 2π again to get
&pi/3 + 2π = 5π/3
Since 0 ≤ 5π/3 ≤ 2π
5π/3 is coterminal with 7π/3.
For 2 and 3, proceed the same way.
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