Posted by Dennis on Monday, April 21, 2008 at 9:59am.
Problem:
cos[arccos(sqrt3/2)arcsin(1/2)]
This is what I have:
cos [(5pi/6)(11pi/6)]
cos (6pi/6) or pi
giving an answer of 1
What I am wondering is should I use the (11pi/6) or should I use (pi/6) because of the restrictions on arcsin x (pi/2)<=x<=(pi/2)
Thank you in advance.

Inverses  bobpursley, Monday, April 21, 2008 at 11:14am
I would use the smaller angle. It should not matter on the final answer.

Inverses  Dennis, Monday, April 21, 2008 at 11:35am
Thank you very much.
The answer doesn't change, but my trig teacher wants to see all of work, and I just wasn't sure which figure to use.
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