Posted by Rachal on Sunday, May 15, 2011 at 1:33pm.
Find all solutions of the equation in the interval [0,2pi) .
cos(theta)=0.7125
If there is more than one solution, separate them with commas.
Do not round any intermediate computations, and round your answer(s) to the nearest hundredth.
Can someone help me with this? Thanks

Trig  bobpursley, Sunday, May 15, 2011 at 2:42pm
my first thought is what unit for angles? degrees, radians? I have never liked computer instruction, they demand precision to the hundreth place, but don't specify the units. It makes a difference.
Cosine is positive in first, fourth quadrant.
arccos.7125=44.56 degrees
so in the fourth quadrant, it is
36044.56 degrees.
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