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A line has direction ratios 1, 2, 2. What is the sine of its angle with the plane z = 0?
A1/3
B1/2
C2/3
D1/sqrt(3)
Answer & Solution
Correct answer: C. 2/3
With plane normal (0,0,1), sin of the angle is |2| divided by the direction length 3, so 2/3.
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