Determine the principal value of cos-1( -1/2).
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Answer:
Answer. Principal value of cos-¹(x) is 0 ≤ y ≤ π . It is used to obtain measure of an angle using its cosine function.
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Answer:
2π/3
Step-by-step explanation:
let y = cos -1(-1/2)
cos = 1/2
cos Y = (2π/3)
Range of principal value of cos -1 is [0, π]
Hence principle value of cos-1 is 2π/3.
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