verawall22 verawall22
  • 16-02-2017
  • Mathematics
contestada

cosX sec^2X tanX - cosX tan^3X = sinX

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LammettHash
LammettHash LammettHash
  • 22-02-2017
[tex]\cos x\sec^2x\tan x-\cos x\tan^3x=\cos x\tan x\left(\sec^2x-\tan^2x\right)=\sin x\left(\sec^2x-(\sec^2x-1)\right)=\sin x[/tex]
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