Thursday

August 28, 2014

August 28, 2014

Posted by **Anonymous** on Thursday, January 26, 2012 at 9:46pm.

a) cos (-17pi/6)

b) sec (3pi/2)

- trig -
**Damon**, Thursday, January 26, 2012 at 9:52pm17/6 = 2 5/6

that is twice around counterclockwise then -5pi/6

that is pi/6 below -x axis

and pi/6 = 180/6 = 30 deg

so 30 deg below -x axis

cos of that is -sqrt3/2

3 pi/2 is 180 + 90 = 270 or on -y axis

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