riannatremper
riannatremper
09-02-2017
Mathematics
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sec^2xcotx-cotx=tanx
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LammettHash
LammettHash
09-02-2017
[tex]sec^2x\cot x-\cot x=\cot x(\sec^2x-1)=\cot x\tan^2x=\tan x[/tex]
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