@mathstudent55 could you help me with this one as well?
Thanks in advance-
cos θ = 1/2 and θ terminates in QIV.
So far I have this:
http://prntscr.com/8dhn18
\[\text{not sure how the answer is not }\sqrt{3}\text{ as I ran through the calculations several times}\]\[\text{with the same result}\]

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