Problem

Problem

Which of the following statements is TRUE? a) The domain of sin⁡θ\sin\theta is the interval [−1,1][-1,1]. b) The function sec⁡θ\sec \theta is undefined at θ=(2n+1)π2\theta=(2n+1)\dfrac{\pi}{2} for all integers nn. c) The function tan⁡θ\tan\theta is undefined at θ=nπ\theta=n\pi for all integers nn. d) The function cot⁡θ\cot\theta is undefined at θ=(2n+1)π2\theta=(2n+1)\dfrac{\pi}{2} for all integers nn.

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