Class 12 Three Dimensional Geometry · Conceptual Answer1 Marksorthogonal_directions
Class 12 Maths · Three Dimensional Geometry · Conceptual Answer #67
Find k so that directions (−3,2k,2) and (3k,1,−5) are orthogonal.
✅ Step-by-Step Solution
Final Answer: k=−10/7.
- Their dot product is −9k+2k−10=−7k−10; set it to zero.
- k=−10/7.
📋 CBSE Stepwise Marking Scheme
- [0.5 marks] Their dot product is −9k+2k−10=−7k−10; set it to zero.
- [0.5 marks] k=−10/7.
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