Some Applications of Trigonometry
CH09 Question Bank
CBSE_CH09_QUESTION_BANK
Grade 10
Question:
If an observer looks straight at an object located exactly at their own eye level (the line of sight is horizontal), the angle of elevation is:
$0^\circ$
$45^\circ$
$90^\circ$
Not defined
Step-by-Step Solution
Key Concept: When the line of sight coincides with the horizontal, there is no angle between them.
Since the line of sight lies exactly along the horizontal, the angle between them is $0^\circ$. [1.0 Mark]
Correct Answer: $0^\circ$
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