The acute angle between normals (1,2,2) and (2,1,2) satisfies cosθ =
The acute angle between normals (1,2,2) and (2,1,2) satisfies cosθ =
- A. 8/9
- B. 1/9
- C. 2/3
- D. 4/9
Answer: A) 8/9
Explanation: Dot product=8, magnitudes=3 and 3. Cosθ=8/9.
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