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OpenStudy (anonymous):
For Triangle ABC, what is the value cosC? http://i1090.photobucket.com/albums/i366/Demon_angel5/untitled-1.png a. 0.5 b. 0.6 c. 0.8 d. 0.9
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Directrix (directrix):
You can use your choice of trig functions. tan(C) = 54/72 (opposite leg over adjacent leg) Crank out C and post here. Someone will check.
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