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February 1, 2015

February 1, 2015

Posted by **Ruby** on Saturday, June 4, 2011 at 10:39pm.

- trig -
**Reiny**, Saturday, June 4, 2011 at 11:35pmnot familiar with the expession "-5 on 4"

do you mean -5/4 ?

if tanØ = -5/4 and cosØ >0

then we know Ø is in quadrant IV

by Pythagoras, the hypotenuse of the standard triangle is √41

sinØ = -5/√41

sec Ø = √41/4

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