Monomath – CBSE | GSEB | IB | JEE Maths by Ajay Yadav (Math King of Katargam) – 15+ Years Experience. Study Notes, Video Lessons, Formula Sheets & PYQs.
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Vector Algebra

Previous Year Questions (2022-2024)

📅 Year 2022

  1. Find unit vector in direction of 2i + 3j - k.
    Show Solution
    |a| = 4+9+1 = 14\nâ = 214i + 314j - 114k
  2. If a = 2i + 3j - k and b = i + 2j + 2k, find a x b and |a x b|.
    Show Solution
    a x b = |i j k; 2 3 -1; 1 2 2|\n= i(6+2) - j(4+1) + k(4-3)\n= 8i - 5j + k\n|a x b| = 64+25+1 = 90 = 310

📅 Year 2023

  1. Find unit vector in direction of 2i + 3j - k.
    Show Solution
    |a| = 4+9+1 = 14\nâ = 214i + 314j - 114k
  2. If a = 2i + 3j - k and b = i + 2j + 2k, find a x b and |a x b|.
    Show Solution
    a x b = |i j k; 2 3 -1; 1 2 2|\n= i(6+2) - j(4+1) + k(4-3)\n= 8i - 5j + k\n|a x b| = 64+25+1 = 90 = 310

📅 Year 2024

  1. Find unit vector in direction of 2i + 3j - k.
    Show Solution
    |a| = 4+9+1 = 14\nâ = 214i + 314j - 114k
  2. If a = 2i + 3j - k and b = i + 2j + 2k, find a x b and |a x b|.
    Show Solution
    a x b = |i j k; 2 3 -1; 1 2 2|\n= i(6+2) - j(4+1) + k(4-3)\n= 8i - 5j + k\n|a x b| = 64+25+1 = 90 = 310