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A line makes 60 degrees with the x-axis and 60 degrees with the y-axis. It can make which angle with the z-axis?
A90 degrees
B45 degrees
C60 degrees
D30 degrees
Answer & Solution
Correct answer: B. 45 degrees
Then n² = 1 - 1/4 - 1/4 = 1/2, so cos γ = 1/√2 and γ = 45 degrees.
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