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Which of the following is not the point of discontinuity of the function \small f(x)=\frac{1+\cos 5 x}{1-\cos 4 x}    ?

Option: 1

x = 0


Option: 2

x=\frac{\pi}{2}


Option: 3

\pi


Option: 4

x=\frac{\pi}{4}


Answers (1)

best_answer

f(x) is continuous  except at the points where  1-\cos 4 x=0

Thus x = 0, x=\frac{\pi}{2}  and x = π  are point of discontinuity. 

 

Posted by

Sanket Gandhi

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