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OpenStudy (anonymous):
Given that cosA=4/5 and cosB=7/25, find the possible values of cos(A+B)
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OpenStudy (anonymous):
this is a non calc question btw :)
OpenStudy (midhun.madhu1987):
|dw:1409111290763:dw|
OpenStudy (midhun.madhu1987):
try this...
OpenStudy (anonymous):
i did, but how do you proceed without a calculator? @midhun.madhu1987
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