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Solve cot^(-1) ((3x^(2) + 1)/(x)) = cot^...

Solve `cot^(-1) ((3x^(2) + 1)/(x)) = cot^(-1) ((1 - 3x^(2))/(x)) - tan^(-1) 6x`

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`cot^(-1) ((3x^(2) + 1)/(x)) = cot^(-1) ((1 - 3x^(2))/(x)) - tan^(-1) 6x`...(i)
`rArr tan^(-1) 6x = tan^(-1) ((3x^(2) + 1)/(x)) - tan^(-1) ((1 - 3x^(2))/(x))`
`rArr 6x = ((3x^(2) + 1)/(x) - (1- 3x^(2))/(x))/(1 + ((3x^(2) + 1)/(x)) ((1 - 3x^(2))/(x)))`
`rArr 6x = (6x^(2))/(x) xx (x^(2))/(x^(2) + 1 - 9x^(4))`
`rArr x^(2) + 1 - 9x^(4) = x^(2)`
`rArr 1 - 9x^(4) = 0 " " ( :' x != 0)`
`rArr 1 - 9 x^(4) = 0`
`rArr x = +- (1)/(sqrt3)`
Both values satisfy given equation (i)
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CENGAGE ENGLISH-INVERSE TRIGONOMETRIC FUNCTIONS-Illustration
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  2. Solve tan^(-1) x + sin^(-1) x = tan^(-1) 2x

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  3. Solve cot^(-1) ((3x^(2) + 1)/(x)) = cot^(-1) ((1 - 3x^(2))/(x)) - tan^...

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  4. If x gt y gt z gt 0, then find the value of "cot"^(-1) (xy + 1)/(x - y...

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  5. Solve tan^(-1) x + cot^(-1) (-|x|) = 2 tan^(-1) 6x

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  6. If a(1), a(2), a(3),...., a(n) is an A.P. with common difference d, th...

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  7. Find the value of sum(r=0)^(oo) tan^(-1) ((1)/(1 + r + r^(2)))

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  8. Find the sum sum(r =1)^(oo) tan^(-1) ((2(2r -1))/(4 + r^(2) (r^(2) -2r...

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  9. Find the value of 4 tan^(-1).(1)/(5) - tan^(-1).(1)/(70) + tan^(-1).(1...

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  10. If (x -1) (x^(2) + 1) gt 0, then find the value of sin((1)/(2) tan^(-1...

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  11. Prove that 3 tan^(-1) x= {(tan^(-1) ((3x - x^(3))/(1 - 3x^(2))),"if ...

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  12. Prove that cot^(-1).(3)/(4) + sin^(-1).(5)/(13) = sin^(-1).(63)/(65)

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  13. Solve : sin^(-1)x + sin^(-1) 2x = (pi)/(3)

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  14. Solve sin^(-1) x + sin^(-1) (1 - x) = cos^(-1) x

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  15. Solve : cos^(-1)(1/2x^2+sqrt(1-x^2).sqrt(1-(x^2)/4))=cos^(-1)x/2-cos^(...

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  16. If x in (0, (pi)/(2)), then show that cos^(-1) ((7)/(2) (1 + cos 2 x) ...

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  17. Which of the following angles is greater ? theta(1) = sin^(-1).(4)/(...

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  18. Find the value lim(n rarr oo) sum(k=2)^(n) cos^(-1) ((1 + sqrt((k -...

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  19. If f(x) = sin^(-1) x then prove that lim(x rarr (1^(+))/(2)) f(3x -4x...

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  20. Solve sin^(-1) x- cos^(-1) x = sin^(-1) (3x -2)

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