If , then is discontinuous at all points…

MATHEMATICS · Single correct · CBSE · Mathematics · Continuity and Differentiability · Continuity and Differentiability

Problem

If f(x)=sec⁡2x+csc⁡2xf(x) = \sec 2x + \csc 2x , then f(x)f(x) is discontinuous at all points in (1) {nπ,n∈N}\{n\pi, n \in \mathbb{N}\} (2) {(2n±1)π4,n∈I}\left\{(2n \pm 1)\frac{\pi}{4}, n \in \mathbb{I}\right\} (3) {nπ4,n∈I}\left\{\frac{n\pi}{4}, n \in \mathbb{I}\right\} (4) {(2n±1)π8,n∈I}\left\{(2n \pm 1)\frac{\pi}{8}, n \in \mathbb{I}\right\}

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