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Mathematics 21 Online
OpenStudy (anonymous):

Trigonometry: Find the values of the other five trig functions. Sinθ=5/13; π/2 < θ < π So far I have y=5, r=13, x=-12. The five trig functions are: Sinθ (y/r), Cosθ (x/r), Tanθ (y/x) cscθ (r/y), secθ (r/x), cotθ (x/y).

OpenStudy (anonymous):

Also the lil section is called, "Trig ratios with sign changes"

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