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If cos^(-1)" 1/x=theta , " then " tan t...

If `cos^(-1)" 1/x=theta , " then " tan theta=`

A

`1//sqrt(x^2-1)`

B

`sqrt(x^2-1)`

C

`sqrt(1-x^2)`

D

`sqrt(x^2+1)`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • If (cos^2 theta -1 ) ( 1- tan^2 theta) + 2tan^2 theta = 1, 0^@ lt theta 90^@ then theta is:

    A
    `90^@`
    B
    `60^@`
    C
    `30^@`
    D
    `45^@`

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