1.

If a line makes angles tan^(-1) sqrt7, tan^(-1) (sqrt5)/(sqrt3) with x-axis, Y-axis respectively, then the angle made by it with Z-axis is

Answer»

`(pi)/(2)`
`(pi)/(6) or (5pi)/(6)`
`(pi)/(3) or (2PI)/(3)`
`(pi)/(4) or (3pi)/(4)`

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