alleryEvery real number corresponds to a radian measure, and the correspondence is:
ARepeatable
BReducible
CReversible
DRemovable
Answer & Solution
Correct answer: C. Reversible
1. The mapping is stated to work in both directions.
2. That is what allows the two to be identified.
3. Every real number will correspond to a radian measure and conversely.
4. So the answer is reversible.
_Source: syllabus Mathematics, Ch 3 'Trigonometric Functions'_
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