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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

`30^@`

B

`45^@`

C

`60^@`

D

`75^@`

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