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The sine function is positive for angles between zero and:
AFour pi
BHalf pi
COne pi
DTwo pi
Answer & Solution
Correct answer: C. One pi
1. It turns negative after that point.
2. That covers the first two quadrants.
3. It is positive from zero to pi.
_Source: NCERT Class 11 Mathematics, Ch 3 'Trigonometric Functions'_
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