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The principal value of cos^(-1)(-1/2) is...

The principal value of `cos^(-1)(-1/2)` is

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The correct Answer is:
N/a

`0 le cos^(-1)x le pi`
`cos^(-1)(-1/2) = cos^(-1)(cos'(2pi)/(3)) = (2p)/(3)`
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Knowledge Check

  • Find the principal value of cos^(-1)(-(1)/(2))+2sin^(-1)(-(1)/(2))

    A
    `(pi)/(2)`
    B
    `(2pi)/(3)`
    C
    `(3pi)/(4)`
    D
    `(5pi)/(8)`
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