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Grade 12th passDifferential Calculus

if f(x) is tan-1(cot x) , then which of the following are incorrect
  1. f(x) is not differentiable at x=π,99π..
  2. f(x) periodic with period π
  3. f’(x)=-1
  4. f(x) is discontinous at x=π/2,3π/2..

Profile image of shiya
7 Years agoGrade 12th pass
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1 Answer

Profile image of Arun
ApprovedApproved Tutor Answer7 Years ago
Dear student
 
f(x) is always continuous at x = pi/2, 3 pi/2,....
 
 
hence option D is incorrect.
 
Regards
Arun

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