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cot^(-1)(-2) is equal to...

`cot^(-1)(-2)` is equal to

A

`pi-tan^(-1)(1/2)`

B

`tan^(-1)(1/2)`

C

`-tan^(-1)1/2`

D

`cot^(-1)2`

Text Solution

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The correct Answer is:
A
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AAKASH INSTITUTE-INVERSE TRIGONOMETRIC FUNCTIONS-ASSIGNMENT (SECTION - A)(OBJECTIVE TYPE QUESTIONS (ONE OPTION IS CORRECT))
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  2. cosec^(-1)(-x),x in R-(-1,1), is equal to

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  3. cot^(-1)(-2) is equal to

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  4. If "sin"{cot^(-1)(x+1)}="cos"(tan^(-1)x), then find xdot

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  5. If sin^(-1)(x-x^2/2+x^3/4…..oo)+cos^(-1)(x^2-x^4/2+x^6/4-……oo)=pi/2 th...

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  6. if tan^(-1)(1/x)+cos^(-1)(2/sqrt5)=pi/4 then x equals

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  7. If 0 < x <1, then sqrt(1+x^2)[{xcos(cot^-1x)+sin(cot^-1 x)}^2-1]^(1/2)...

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  8. If x1=cos^(-1)(3/5)+cos^(-1)((2sqrt2)/3)and x2=sin^(-1)(3/5)+sin^(-1)(...

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  9. If tan(sin^(-1)sqrt(1-x^2))=sin(tan^(-1)2) then x is

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  10. If 0 le x le 1 then cos^(-1)(2x^(2)-1) equals

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  11. Express in terms of : sin^(-1)(2xsqrt(1-x^(2))) to sin^(-1)x for 1gexg...

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  12. sin^(-1) (5/x) +sin^(-1) (12/x) =pi/2

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  13. tan^(-1)((sqrt(1+x^2)+sqrt(1-x^2))/(sqrt(1+x^2)-sqrt(1-x^2))),absxx le...

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  14. If cos^(-1)(x/m)+cos^(-1)(y/n)=theta, then x^2/m^2-(2xy)/(mn)costheta+...

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  15. tan^(-1)(1/2)+tan^(-1)(1/3) is equal to

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  16. cos(tan^(-1)3/4)+cos(tan^(-1)x) is equal to

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  17. If cot^(-1)x+tan^(-1)(1/2)=pi/4 then x is

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  18. The value of cos^(-1)(-1)+sin^(-1)(1) is

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  19. If sin^(- 1)(3/x)+sin^(- 1)(4/x)=pi/2 then x=

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  20. The domain of the function f(x)=cos^(-1)((2-absx)/4) is

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