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Mathematics 18 Online
OpenStudy (studytheworld):

Help!!! Will medal and fan! Calculate cos (theta) to two decimal places.

OpenStudy (studytheworld):

Here is the triangle and the answer selections: http://prntscr.com/8z31uu

OpenStudy (anonymous):

Use the Law of Cosines. http://www.mathsisfun.com/algebra/trig-cosine-law.html

OpenStudy (studytheworld):

Okay, but what the heck is theta? I don't even know how to start this problem.

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