Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesFundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles
MediumThe value of the expression $\tan(x - 9\pi)$ is equal to:
- A$-\tan x$
- B$-\cot x$
- C$\tan x$
- D$\cot x$
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