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+1 vote
22.5k views
in Mathematics by (150k points)

A line AB in three-dimensional space makes angles 45° and 120° with the positive x-axis and the positive y-axis respectively. If AB makes an acute angle q with the positive z-axis, then q equals 

(a) 30° 

(b) 45° 

(c) 60° 

(d) 75°

1 Answer

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