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OpenStudy (anonymous):
If cosx = -3/5, and pi
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OpenStudy (anonymous):
When you see fraction made out of 3s 4s or 5s, try to make a 3,4,5 triangle to answer the question with SOH CAH TOA
OpenStudy (anonymous):
You need these formulas for this whole HW: http://mathworld.wolfram.com/Double-AngleFormulas.html
OpenStudy (anonymous):
Thank you!!!
OpenStudy (anonymous):
whats the answer
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