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The function f(x)=tanx is discontinuous ...

The function `f(x)=tanx` is discontinuous on the set `(a){npi; n in Z}` (b) `{2npin in Z}` `{(2n+1)pi/2: n in Z}` (d) `{(npi)/2: n in Z}`

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We have given,
`f(x)=tanx`is discountinuous
Since a,b and c are in AP, then `2b=a+c`
`\begin{vmatrix} x+1 & x+2& x+a\\ x+2 & x+3& x+b\\ x+3& x+4 & x+c \end{vmatrix}=0
...
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