MCQ
$\sin \left(\frac{1}{2} \cos ^{-1} \frac{4}{5}\right)=$
  • A
    $\frac{1}{\sqrt{5}}$
  • B
    $\frac{2}{\sqrt{5}}$
  • $\frac{1}{\sqrt{10}}$
  • D
    $\frac{2}{\sqrt{10}}$

Answer

Correct option: C.
$\frac{1}{\sqrt{10}}$
C

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free