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September 19, 2014

September 19, 2014

Posted by **Anonymous** on Monday, November 12, 2012 at 3:02pm.

- Math -
**Reiny**, Monday, November 12, 2012 at 3:33pmcos 3x = 1

we know cos 0 = 1 and also cos 2π=1

so 3x = 0 or 3x = 2π

**x = 0 or x = 2π/3**

the period of cos 3x = 2π/3,

so a general solution is

x = 2πk/3, where k is an integer.

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