Question

What is the principle value of Arcsin 2x

Answer 1

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As a Real valued function arcsin2 is undefined, since sin(x)∈[−1,1] for all x∈R

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Answer 2

Answer:

That single answer is called the principal value, and is written Arcsin(0.82): Arcsin(0.82) ≈ 55°, or 55π/180 = 0.96 in radian measure. A portion of y = arcsin(x)