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Maths CBSE Live product
Class 10 (2025-26)
Some Applications of Trigonometry
Annual Revision III -Some Applications of Trigonometry
9.
Find the height of the cloud
Question:
5
m.
The angle of
elevation
of a
cloud
from a point \(H\) metres above the
surface
of a
lake
is \(\delta\) and the angle of
depression
of its
reflection
in the lake is \(\epsilon\), then the
height
of the
cloud
above the lake is
\(x = H(\frac{tan \delta + tan \epsilon}{tan \epsilon - tan \delta})\)
\(x =H (\frac{tan \epsilon - tan \delta}{tan \epsilon + tan \delta})\)
\(x = H (\frac{tan \delta - tan \epsilon}{tan \epsilon - tan \delta})\)
\(x = H (\frac{tan \epsilon + tan \delta}{tan \epsilon - tan \delta})\)
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