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In the diagrams, OA is called the initial side and OB the:
ATrailing side
BTurning side
CTerminal side
DTangent side
Answer & Solution
Correct answer: C. Terminal side
1. The ray rotates from one to the other.
2. OA is where the rotation starts.
3. OB is the terminal side.
_Source: NCERT Class 11 Mathematics, Ch 3 'Trigonometric Functions'_
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