Q 2349178013.     A line makes the same angle a with each of the `X`
and `Y`-axes. If the angle `theta`, which it makes with the
`Z`-axis, is such that `sin^2 theta = 2 sin^2 alpha`, then what is
the value of `alpha`?

NDA 2009 Paper 1 September
A

`pi/4`

B

`pi/6`

C

`pi/3`

D

`pi/2`

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