need help solving

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- November 10th 2010, 12:08 PMidunit14solution in the interval [0,360] cos2theta=square root (3)/2
need help solving

- November 10th 2010, 12:29 PMpickslides

Make therefore

Using the 30-60-90 special triangle

Now what other quadrants is positive in? and how many solutions are we looking for? - November 10th 2010, 01:25 PMProve It
- November 10th 2010, 01:26 PMProve It