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September 18, 2014

September 18, 2014

Posted by **Abbey** on Monday, March 8, 2010 at 5:13pm.

67 degrees 30'

- Pre-Cal(Please help) -
**drwls**, Monday, March 8, 2010 at 5:37pmUse the half angle formulas at

http://www.sosmath.com/trig/douangl/douangl.html

The sine of the full angle (135 deg) is 1/sqrt2 and the cosing is -1/sqrt2

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