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