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If xy=1 + a^(2) then show that t...

If `xy=1 + a^(2) ` then show that
` tan^(-1) ""(1)/(a+x)+tan ^(-1) ""(1)/(a+y)=tan ^(-1)""(1)/(a) , x+y+2a ne 0`

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CHHAYA PUBLICATION-TRIGONOMETRIC INVERSE CIRCULAR FUNCTIONS-Short answer type questions
  1. cos (2cos ^(-1) x+sin ^(-1) x) , " when " x=(1)/(5) where 0 le ...

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  2. 2 tan ^(-1)""(1+x)/(1-x)+sin ^(-1)""(1-x^(2))/(1+x^(2))

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  3. tan (sin ^(-1)x+sin ^(-1) y) +tan (cos^(-1)x+cos ^(-1)y)

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  4. If xy=1 + a^(2) then show that tan^(-1) ""(1)/(a+x)+tan ^(-1) ...

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  5. "If " tan^(-1) x+ tan^(-1) y+tan ^(-1)z=(pi)/(2) , show that , x...

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  6. if tan ^(-1) x+tan ^(-1) y+tan ^(-1) z=pi prove that x+y+z=xyz

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  7. if cos^(-1)x+cos ^(-1)y+cos^(-1) z=pi prove that x^(2) +y^(2)+z...

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  8. "if " sin^(-1) x +sin ^(-1) y+sin ^(-1) z=pi show that , x^(4)+y...

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  9. IF cos (alpha +beta )=(5)/(13) and cos (alpha - beta )=(4)/(5), t...

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  10. If tan ^(-1) y= 4 tan ^(-1) x , find the algebric relation bet...

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  11. If tan ^(-1)x , tan ^(-1) y and tan^(-1) z are in A.P find t...

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  12. tan ^(-1) (x+1) + tan^(-1) (x-1) = tan ^(-1)"" (8)/(31)

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  13. tan (cos ^(-1) x) = sin (cot ^(-1) ""(1)/(2))

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  14. tan ^(-1)((1)/(2) sec x) + cot^(-1)(2cos x) =(pi)/(3)

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  15. sin ^(-1) ""(2a)/(1+a^(2))+sin ^(-1) ""(2b)/(1+b^(2) ) = 2 tan ^(-1...

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  16. tan ^(-1) ""(x-1)/(x-2) + tan ^(-1) ""(x+1)/(x+2)=(pi)/(4)

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  17. tan ^(-1) ""(x-1)/(x-2) +tan ^(-1) ""(x+1)/(x+2)=(pi)/(4)

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  18. sin ^(-1)cos sin^(-1)""x=(pi)/(3)

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  19. tan^(-1)x+tan^(-1) (1-x) = 2 tan ^(-1) sqrt(x(1-x))

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  20. 3 sin ^(-1 ) ""(2x )/(1+x^(2))-4cos^(-1) ""(1-x^(2))/(1+x^(2))+2tan ^...

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