JEE Math Practice Question
A line $$AB$$ in three-dimensional space makes angles $${45^ \circ }$$ and $${120^ \circ }$$ 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.$${45^ \circ }$$
- B.$${60^ \circ }$$
- C.$${75^ \circ }$$
- D.$${30^ \circ }$$
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