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The value of cot (pi)/(4)-2 cot^-1(3) is...

The value of `cot (pi)/(4)-2 cot^-1(3)` is

A

`1`

B

`7`

C

`-1`

D

None of these

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • The value of cot(tan^(-1)x+cot^(-1)x) is equal to

    A
    1
    B
    0
    C
    `-(pi)/(2)`
    D
    `(pi)/(2)`

  • The value of cot(sin^(-1)x) is

    A
    `sqrt(1+x^(2))//x`
    B
    `x/sqrt(1+x^(2))`
    C
    `1/x`
    D
    `sqrt(1-x^(2))/x`

  • The value of cot(sin^(-1)x) is

    A
    `(sqrt(1+x^(2)))/(x)`
    B
    `(x)/(sqrt(1+x^(2)))`
    C
    `(1)/(x)`
    D
    `sqrt(1-x)^(2)/(x)`

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