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Check an identity numerically and interpret discrepancies
Worksheet
Grade Level
Trigonometry
TRIG.89 Check an identity numerically and interpret discrepancies
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🔴 Hard
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A student uses a numerical check to decide between two possible identities. Which approach is most reliable (though still not a proof)?
A
Test only one value with lots of decimals; that is always enough.
B
Test many varied values and also check for undefined points and domain restrictions for both expressions.
C
Test only x = 0 because it is simplest.
D
Test only special angles where trig values are 0 or 1.
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