railway RRB Technician Grade 1 Mock Test 2024 Quantitative Aptitude Trigonometry Heights and Distances
A vertical tower stands on a horizontal plane and is surmounted by a vertical flag staff of height h. At a point on the plane, the angle of elevation of the bottom of the flag staff is α and that of the top of the flag staff is β. Then the height of the tower is
1
h tan a
2
\(\frac{h \tan \alpha}{\tan \beta-\tan \alpha}\)
3
\(\frac{h \tan \alpha}{\tan \alpha-\tan \beta}\)
4
None of these