NCERT Class 12 · Ch 10 Exercise 10.4 · Q1
NCERT Class 12 Maths · Chapter 10 Vector Algebra · Exercise 10.4 Question 1
Find |a×b| for a=i−7j+7k, b=3i−2j+2k.
💡 Concept Hints
- Write the vector components and identify the required direction or geometric relation.
- Use the magnitude, dot-product, cross-product or section formula that matches the requested quantity.
✅ Step-by-Step Solution
Final Answer: \(19 \sqrt{2}\)
- The cross product is \(\left[\begin{matrix}0\\19\\19\end{matrix}\right]\), using the signed 2×2 minors of the component matrix.
- Its magnitude is \(19 \sqrt{2}\).
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