5 Questions
What symbol is sometimes used to indicate identities instead of the equals sign?
≡
Which of the following best describes a mathematical identity?
An equality that holds true for all values of the variables within a certain range of validity
Which type of identity involves functions that are differently defined but produce the same value?
Trigonometric identities
What are trigonometric identities distinct from?
Triangle identities
Which type of identity can be useful in simplifying algebraic expressions and expanding them?
( a + b ) 2 = a 2 + 2 a b + b 2
Test your knowledge of mathematical identities with this quiz. Identify which expressions are equivalent for all values of the variables within a certain range of validity.
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