The angle between the lines r = 3i + 2j - 4k + (i + 2j + 2k) and r = 5j - 2k + (3i + 2j + 6k) is : Option 1: ^-1(19/21) Option 2: ^-1(19/23) Option 3: ^-1(19/21) Option 4: ^-1(19/23)

The answer is '^-1(19/21)'. View full solution:

CUET Mathematics - The angle between the lines r = 3i + 2j - 4k + (i + 2j + 2k) and r = 5j - 2k + (3i + 2j + 6k) is : | PYQs + Solutions

CUET Mathematics 2023 23 May Shift 3

Geometry

Medium

$\sin^{-1}\left(\frac{19}{21}\right)$

$\cos^{-1}\left(\frac{19}{23}\right)$

$\cos^{-1}\left(\frac{19}{21}\right)$

$\sin^{-1}\left(\frac{19}{23}\right)$

✅ Correct Option: 3