# find the exact value

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• Sep 19th 2010, 12:01 AM
aeroflix
find the exact value
Attachment 18966

pls show your answers for me to know if im correct

mine is

a. -24/25
b. 7/25
c. 24/7
• Sep 19th 2010, 12:04 AM
Prove It
I don't think this is possible, since cosine is negative in the third quadrant and $B$ is in the third quadrant...