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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