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October 20, 2014

October 20, 2014

Posted by **Bailey** on Sunday, May 12, 2013 at 8:07pm.

- Math -
**Reiny**, Sunday, May 12, 2013 at 10:43pmcosx = √3/2

and we know that the cosine is positive in quadrants I and IV

I also know that cos 30° or cos π/6 = √3/2

so x = 30° or 330° OR π/6 , 11π/6 in radians

then sinx = 1/2

or

sinx = -1/2 (because the sine is negative in IV)

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