(C) The range of $\sin \theta$ is $[-1, 1]$,so $\sin \theta = -\frac{1}{5}$ is possible.The range of $\cos \theta$ is $[-1, 1]$,so $\cos \theta = 1$ i

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(C) The range of $\sin \theta$ is $[-1, 1]$,so $\sin \theta = -\frac{1}{5}$ is possible.The range of $\cos \theta$ is $[-1, 1]$,so $\cos \theta = 1$ is possible.The range of $\sec \theta$ is $(-\infty, -1] \cup [1, \infty)$. Since $\frac{1}{2} The range of $\tan \theta$ is $(-\infty, \infty)$,so $\tan \theta = 20$ is possible.Therefore,the incorrect statement is $C$.

Class 11 Mathematics Trigonometrical Ratios, Functions and Identities Fundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles

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Which of the following statements is incorrect?

A
$\sin \theta = -\frac{1}{5}$
B
$\cos \theta = 1$
C
$\sec \theta = \frac{1}{2}$
D
$\tan \theta = 20$

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Trigonometrical Ratios, Functions and Identities

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Fundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles

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Which of the following statements is incorrect?

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