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April 21, 2015

April 21, 2015

Posted by **Yuli** on Monday, November 21, 2011 at 5:35am.

a.sin2θ

b.tan θ/2

could some1 help me with these 2 they're the only ones i couldn't get

- mathematics -
**drwls**, Monday, November 21, 2011 at 8:56amOK so it is in the second quadrant and the reference angle is arctan 2√10/3.

The ref. angle is arctan2.1082 = 64.6 degrees.

The angle itself is 180 -64.6 = 115.4 degrees = 2.0137 radians.

use that to compute (a) and (b)

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