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Questions  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class11  >>  3-D Geometry
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Q)

A line makes angle $\theta$ with both $x\:axis$ and $z\:axis$. If it makes angle $\alpha$ with $y\:axis$ and $\sin^2\alpha=2 \sin^2\theta$ then $\cot^2\theta=?$

$(a)\;2/3\:\:\:\qquad\:\:(b)\:\:1\:\:\:\qquad\:\:(c)\:\:3/5\:\:\:\qquad\:\:(d)\:\:5/3$

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