Some Applications of Trigonometry
CH09 Question Bank
CBSE_CH09_QUESTION_BANK
Grade 10
Question:
A $15$ m long ladder makes an angle of $60^\circ$ with the wall (NOT the ground). Find the height it reaches on the wall.
Step-by-Step Solution
Key Concept: Since the angle is measured from the wall (vertical), the height reached is adjacent to this angle.
Height $=15\cos60^\circ$ (adjacent side, using the angle from the vertical wall). [1.0 Mark]
$=15\times\dfrac12=7.5$ m. [1.0 Mark]
Correct Answer:
Confused by the solution? Ask the AI to explain a specific step, tell you where you went wrong, or break down the key trap in this question.