AP Precalculuseasymcq1 pt
The Pythagorean identity is
A.sin²x + cos²x = 1
B.sin²x − cos²x = 1
C.sin x + cos x = 1
D.tan²x + 1 = 0
Explanation
Core Concept
The fundamental trig identity.
Correct Answer
Asin²x + cos²x = 1
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