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A line makes the same angle `alpha` with each of the x and y axes. If the angle `theta`, which it makes with the z-axis, is such that `sin^2theta=2sin^2alpha`, then what is the value of `alpha`?

A

`pi//4`

B

`pi//6`

C

`pi//3`

D

`pi//2`

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The correct Answer is:
A
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