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A line AB in three-dimensional space mak...

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 `theta` with the positive z-axis, then `theta` equals

A

`45^(@)`

B

`60^(@)`

C

`75^(@)`

D

`30^(@)`

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The correct Answer is:
B
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  8. The point of intersection of the lines (x-4)/(1)=(y+3)/(-4)=(z+1)/(4) ...

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  13. If the straight lines (x-1)/(k)=(y-2)/(2)=(z-3)/(3) and (x-2)/(3)=(y-3...

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  14. A line makes the same angle theta, with each of the x and z axis. If t...

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  15. If a line makes an angle of pi//4with the positive directions of each ...

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