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OpenStudy (anonymous):
evaluate t an(cos^-1(-15/17))
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OpenStudy (anonymous):
Let \(\large y=cos^{-1}(\frac{-15}{17}) \) and now your problem is basically asking to evaluate tan y = ??? So \(\large cosy=\frac{-15}{17} \)
OpenStudy (anonymous):
Now make a right triangle according to cosy = -15/17. Can you find the missing side here?: |dw:1353740458844:dw|
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