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Trigonometry 17 Online
OpenStudy (anonymous):

one of sin x, cos x, and tan x is given. Find the other two if x lies in the specified interval. cos x = -5/13 , x { [ pi/2 , pi]

OpenStudy (cwrw238):

note the pythagorean triad 13-12-5 |dw:1383155279209:dw|

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