Class 12 Three Dimensional Geometry · Conceptual Answer1 Marksdirection_cosines
Class 12 Maths · Three Dimensional Geometry · Conceptual Answer #28
Find direction cosines for direction ratios (2,−1,−2).
✅ Step-by-Step Solution
Final Answer: ±(2,−1,−2)/3.
- The norm is √9=3. Normalize the direction, allowing reversal.
- ±(2,−1,−2)/3.
📋 CBSE Stepwise Marking Scheme
- [0.5 marks] The norm is √9=3. Normalize the direction, allowing reversal.
- [0.5 marks] ±(2,−1,−2)/3.
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