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Which of the following is/are the value of `"cos"[1/2cos^(-1)(cos(-(14pi)/5)]?` `cos(-(7pi)/5)` (b) `sin(pi/(10))` `cos((2pi)/5)` (d) `-cos((3pi)/5)`

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The value of cos[(1)/(2)cos^(-1)(cos(-(14 pi)/(5)))] is/are a.cos (-(7 pi)/(5)) b.sin((pi)/(10))ccos((2 pi)/(5))d.-cos((3 pi)/(5))

The value of cos[(1)/(2)cos^(-1)cos((14 pi)/(5))]is(a)cos((2 pi)/(5))(b)cos(-(7 pi)/(5))(c)sin((pi)/(10))(d)-cos((3 pi)/(5))

Knowledge Check

  • Which of the following is/are the value of cos [(1)/(2) cos^(-1) (cos (-(14pi)/(5)))] ?

    A
    `cos(-(7pi)/(5))`
    B
    `sin((pi)/(10))`
    C
    `cos((2pi)/(5))`
    D
    `-cos((3pi)/(5))`

  • "cos"^(-1)("cos"((7pi)/(5)))=

    A
    `(3pi)/(5)`
    B
    `(2pi)/(5)`
    C
    `(-7pi)/(5)`
    D
    `(7pi)/(5)`

  • The value of cos^(-1)("cos"(5pi)/3)+sin^(-1)("cos"(5pi)/3) is:

    A
    `(10pi)/3`
    B
    0
    C
    `pi/2`
    D
    `(5pi)/3`

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