1.

If a line makes angles cos^(-1)(1//5),cos^(-1)(3//5) with X and Y- axes respectively, then the angle made by the line with Z-axis is

Answer»

`COS^(-1)(1//5)`
`cos^(-1)(2//5)`
`cos^(-1)SQRT(3//5)`
`cos^(-1)(4//5)`

ANSWER :C


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