InterviewSolution
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InterviewSolution
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Find the angle between the planes `x+y+2z=9a d n2x-y+z=15.`A. `(pi)/6`B. `(pi)/3`C. `(pi)/4`D. none of these |
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Answer» Correct Answer - B Let `theta` be the angle between the planes `x+y+2z=9` and `2x-y+z=15`. Then `cos theta=((1)(2)+(1)(-1)+(2)(1))/(sqrt(1^(2)+1^(2)+2^(2))sqrt(2^(2)+(-1)^(2)+1^(2)))=1/2impliestheta=(pi)/3` |
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