Three Dimensional Geometry · Class 12 · CBSE · Science Mathematics
The acute angle between the planes 2x - y + 2z = 5 and x + 2y + 2z = 7 has cosine equal to:
Practice question from Three Dimensional Geometry (Class 12 · CBSE · Science Mathematics), with the correct answer and a step-by-step solution.
medium · MCQ · Q-BF04BB
The acute angle between the planes 2x - y + 2z = 5 and x + 2y + 2z = 7 has cosine equal to:
- A.1/9
- B.2/9
- C.4/9Correct answer
- D.8/9
Solution
The normal vectors are and . Therefore, .
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