MCQ
$\Bigg(\cot\Bigg(\sin^{-1}\sqrt{\frac{2-\sqrt{3}}{4}}+\cos^{-1}\frac{\sqrt{-12}}{4}+\sec^{\sqrt{2}}\Bigg)\Bigg)$ is:
  • $0$
  • B
    $ 2\pi ​$
  • C
    $ 3\pi ​$
  • D
    None of these

Answer

Correct option: A.
$0$
The above expression can be rewritten as
$\sin^{-1}(\cot(15^{0}+30^{0}+45^{0}))$
$ =\sin^{-1}(\cot(90^{0}))$
$ =\sin^{-1}(0)$
$ = 0$

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