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OpenStudy (anonymous):
Evaluate tan(cos^-1(-15/17) i need help!!
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OpenStudy (yolomcswagginsggg):
x=15 r=17 y=square root (17^2 - 15^2) =8 tanx=y/x so the answer is 8/15
OpenStudy (anonymous):
thank you very much :)
OpenStudy (yolomcswagginsggg):
np!
OpenStudy (anonymous):
Acctually its -8/15
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