Some Applications of Trigonometry
CH09 Question Bank
CBSE_CH09_QUESTION_BANK
Grade 10
Question:
A ladder $6$ m long is placed against a wall, making an angle of $45^\circ$ with the ground. Find the height it reaches on the wall.
Step-by-Step Solution
Key Concept: The height reached is opposite the ground angle; the ladder is the hypotenuse.
Height $=6\sin45^\circ=6\times\dfrac{1}{\sqrt2}$. [1.0 Mark]
$=\dfrac{6}{\sqrt2}=3\sqrt2$ m. [1.0 Mark]
Correct Answer:
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