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cos^(-1) ""(cos"" (7pi )/(6))...

`cos^(-1) ""(cos"" (7pi )/(6))`

A

`(7pi)/(6)`

B

`(5pi)/(6)`

C

`(pi)/(3)`

D

`(pi)/(6)`

Text Solution

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The correct Answer is:
B
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TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS -Competitive Thinking
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  2. For the equation cos^(-1)x+cos^(-1)2x+pi=0 , the number of real soluti...

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  3. cos^(-1) ""(cos"" (7pi )/(6))

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  4. The value of sin^(-1)(cos.(53pi)/(5)) is

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  5. tan^(-1) (cot x) +cot^(-1)(tan x) =pi -2x

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  6. tan((1)/(2).cos^(-1).(2)/(sqrt(5)))=

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  7. If sin^(-1)((2a)/(1+a^(2)))-cos^(-1)((1-b^(2))/(1+b^(2)))=tan^(-1)((2x...

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  8. If 0lexle1 then sin{tan^(-1)(1-x^(2))/(2x)+cos^(-1)(1-x^(2))/(1+x^(-...

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  9. The value of cot^(-1){(sqrt(1-sinx)+sqrt(1+sinx))/(sqrt(1-sinx)-sqrt(1...

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  10. cot^(-1)((sqrt(1+x^(2))-1)/(x))=

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  11. tan^(-1)""(1-x)/(1+x)=(1)/(2)tan^(-1)x,(xgt0)

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  12. Given , 0lexle(1)/(2), then the value of tan["sin"^(-1){(x)/(sqrt(2))...

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  13. sec^(-1)[sec(-30^(@))]=

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  14. The value of cos ^(-1)""[cot ((pi)/(2))]+cos^(-1)""[sin ((2pi)/(3))...

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  15. (tan^(- 1)(sqrt(3))-sec^(- 1)(-2))/(cosec^(- 1)(-sqrt(2))+cos^(- 1)(-1...

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  16. If sec^-1x=cosec^-1y,then cos^(- 1)(1/x)=cos^(- 1)(1/y)=

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  17. If alpha and beta are roots of the equation x^(2)+5|x|-6=0, then the v...

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  18. If 4sin^(-1)x+cos^(-1)x=pi, then x is equal to

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  19. cos[2cos^(-1).(1)/(5)+sin^(-1).(1)/(5)]=

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  20. cos[2(tan^(-1).(1)/(5)+tan^(-1)5)] = .

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