nanicastillo
nanicastillo
13-01-2017
Mathematics
contestada
cot^3/csct=cost(csc^2t-1)
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LammettHash
LammettHash
13-01-2017
[tex]\dfrac{\cot^3t}{\csc t}=\dfrac{\dfrac{\cos^3t}{\sin^3t}}{\dfrac1{\sin t}}=\dfrac{\cos^3t}{\sin^2t}=\cos t\cot^2t=\cos t(\csc^2t-1)[/tex]
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