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December 18, 2014

December 18, 2014

Posted by **Kate** on Thursday, May 1, 2008 at 2:04pm.

2 pi n

pi/2 + 2 pi n

pi + 2 pi n

3 pi/2 +2 pi n

Can someone please help. I dont understand how to do this.

- Advanced Math -
**drwls**, Thursday, May 1, 2008 at 4:09pmSin x = -1 when x is 270 degrees, which is 3 pi/2 radians. If you add (2 n pi) to that, where n is an integer, you get the same value for the sin.

Therefore the correct answer is the last one.

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