alleryAn equation true for all values of the angle is called an:
AInstances
BIdentity
CEstimate
DEquation
Answer & Solution
Correct answer: B. Identity
1. Some equations hold only for particular angles.
2. Others hold for every value in the range.
3. Those are called trigonometric identities.
4. So the answer is an identity.
_Source: syllabus Mathematics, Ch 8 'Introduction to Trigonometry'_
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