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Some Applications of Trigonometry

CH09 Question Bank

CBSE_CH09_QUESTION_BANK

Grade 10

Question:

A vertical stick $20$ m long casts a shadow $20\sqrt3$ m long on the ground. Find the angle of elevation of the sun.

Step-by-Step Solution

Key Concept: Apply tanθ = height/shadow length.

$\tan\theta=\dfrac{20}{20\sqrt3}=\dfrac{1}{\sqrt3}$. [1.0 Mark]

$\theta=30^\circ$. [1.0 Mark]

Correct Answer:

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