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veronikarossi veronikarossi
  • 06-02-2017
  • Mathematics
Answered

Prove the identity:


cos(x-y)/cos x sin y = cot y + tan x

Verified Answer :

LammettHash
LammettHash LammettHash
  • 06-02-2017

\(\dfrac{\cos(x-y)}{\cos x\sin y}=\dfrac{\cos x\cos y+\sin x\sin y}{\cos x\sin y}=\dfrac{\cos y}{\sin y}+\dfrac{\sin x}{\cos x}=\cot y+\tan x\)

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