MCQ

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The angle subtended by the vector $A =5 \hat{ i }+3 \hat{ j }+12 \widehat{ k }$ with the $X$-axis is

• A
  $\cos ^{-1}\left(\frac{3}{13}\right)$
• B
  $\sin ^{-1}\left(\frac{3}{13}\right)$
• C
  $\sin ^{-1}\left(\frac{4}{13}\right)$
• ✓
  $\cos ^{-1}\left(\frac{4}{13}\right)$