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Extending the ratios turns them from ratios into:
AFormulas
BFunctions
CFractions
DFactors
Answer & Solution
Correct answer: B. Functions
1. A ratio applies only to a triangle's sides.
2. Once any angle is allowed, a mapping is defined.
3. We generalise the concept of trigonometric ratios to trigonometric functions.
4. So the answer is functions.
_Source: NCERT Class XI Mathematics, Ch 3 'Trigonometric Functions'_
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