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Some Applications of Trigonometry

CH09 Question Bank

CBSE_CH09_QUESTION_BANK

Grade 10

Question:

From the top of a cliff $100$ m high, the angle of depression of a boat is $45^\circ$. Find the distance of the boat from the base of the cliff.

Step-by-Step Solution

Key Concept: Use the equal alternate angle property, then apply tanθ = height/distance.

$\tan45^\circ=\dfrac{100}{d}\Rightarrow 1=\dfrac{100}{d}$. [1.0 Mark]

$d=100$ m. [1.0 Mark]

Correct Answer:

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