CBSE 2025 · Region 5 · Set 1 · Q7 · 1 mark
The principal value of $\displaystyle \cot ^{-1}\left(-\frac{1}{\sqrt{3}}\right)$ is :
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle \frac{2 \pi}{3}$
Inverse Trigonometric FunctionsBasic Concepts of Inverse Trigonometric FunctionsRemembermcqeasy
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CBSE Class 12 Mathematics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.