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3D Geometry question

2021 · 27 Aug · Shift 2 · Q23
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  5. /2021 · 27 Aug · Shift 2 · Q23

3D Geometry question

2021 · 27 Aug · Shift 2 · Q23

JEE MainMathematics3D GeometryMCQ+4 / −1
The angle between the straight lines, whose direction cosines are given by the equations 2l + 2m −-− n = 0 and mn + nl + lm = 0, is :
  1. A
    π2{\pi \over 2}2π​
  2. B
    π−cos⁡−1(49)\pi - {\cos ^{ - 1}}\left( {{4 \over 9}} \right)π−cos−1(94​)
  3. C
    cos⁡−1(89){\cos ^{ - 1}}\left( {{8 \over 9}} \right)cos−1(98​)
  4. D
    π3{\pi \over 3}3π​
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