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Question: Answered & Verified by Expert
In ( 0,2π ), the total number of points where fx=max.sinx,cosx,1cosx  is not differentiable, are equal to
MathematicsContinuity and DifferentiabilityJEE Main
Options:
  • A 3
  • B 4
  • C 5
  • D 6
Solution:
1913 Upvotes Verified Answer
The correct answer is: 3
The graph of fx=max.sinx,cosx,1cosx  is



fx is not differentiable at x= π 4 , π 2 , 5π 3 .
 
fx is not differentiable at 3 points

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