Practicing Success
Practicing Success
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Which of the following is not the point of discontinuity of the function $f(x)=\frac{1+\cos 5 x}{1-\cos 4 x}$? |
x = 0 $x=\frac{\pi}{2}$ $\pi$ $x=\frac{\pi}{4}$ |
$x=\frac{\pi}{4}$ |
f(x) is continuous except at the points where 1 – cos 4x = 0. Thus x = 0, x = $\frac{\pi}{2}$ and $x =\pi$ are point of discontinuity. Hence (4) is the correct answers. |
