In a cubical hall with each side

MATHEMATICS · Single correct · CBSE · Mathematics · Introduction to Three-Dimensional Geometry · Introduction to Three-Dimensional Geometry

Problem

In a cubical hall ABCD,PQRSABCD, PQRS with each side 10 m10\,\mathrm{m}, GG is the centre of the wall BCRQBCRQ and TT is the midpoint of side ABAB. The angle of elevation of GG from TT is (1) sin⁡−1(13)\sin^{-1}\left(\frac{1}{\sqrt{3}}\right) (2) cos⁡−1(13)\cos^{-1}\left(\frac{1}{\sqrt{3}}\right) (3) tan⁡−1(13)\tan^{-1}\left(\frac{1}{\sqrt{3}}\right) (4) cot⁡−1(13)\cot^{-1}\left(\frac{1}{\sqrt{3}}\right)

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