alleryAn equation true for all values of the variables involved is called an:
AEquation
BInequality
CExpression
DIdentity
Answer & Solution
Correct answer: D. Identity
1. Some equations hold only for particular values.
2. One that never fails has a special name.
3. It is an identity.
_Source: syllabus Mathematics, Chapter 8, Introduction to Trigonometry._
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