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Let alpha,betaandgamma be the angles mad...

Let `alpha,betaandgamma` be the angles made by a line with the positive directions of the axes of reference in three dimensions. If `theta` is the acute angle given by `costheta=(cos^(2)alpha+cos^(2)beta+cos^(2)gamma)/(sin^(2)alpha+sin^(2)beta+sin^(2)gamma)`, then `theta` equals.

A

`pi//6`

B

`pi//3`

C

`pi//2`

D

`pi//4`

Text Solution

Verified by Experts

The correct Answer is:
B
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MCGROW HILL PUBLICATION-THE DIMENSIONAL GEOMETRY -QUESTIONS FROM PREVIOUS YEARS. B-ARCHITECTURE ENTRANCE EXAMINATION PAPERS
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