Inverse trigonometric functions
Concept 2 of 4 in Inverse Trigonometric Functions
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A calculator gives sin−1(sin4π5)\sin^{-1}(\sin\frac{4\pi}{5})sin−1(sin54π) =π5= \frac{\pi}{5}=5π, not 4π5\frac{4\pi}{5}54π. Is the calculator wrong?
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