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2 tan ^(-1) (sqrt((a-b)/(a+b))tan""(x)/(...

`2 tan ^(-1) (sqrt((a-b)/(a+b))tan""(x)/(2))=cos^(-1)""(acos x+b)/(a+b cos x)`

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CHHAYA PUBLICATION-TRIGONOMETRIC INVERSE CIRCULAR FUNCTIONS-Long answer type questions
  1. cos^(-1)""(3)/(5) +cos ^(-1) "" (12)/(13) +cos ^(-1) "" (63)/(65)=(pi)...

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  2. tan^(-1) ""((1)/(2)tan 2A)+tan ^(-1)(cotA)+tan^(-1)(cot^(3)A) ={{:(0"...

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  3. 2 tan ^(-1) (sqrt((a-b)/(a+b))tan""(x)/(2))=cos^(-1)""(acos x+b)/(a+b ...

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  4. tan ( 2 tan ^(-1)sqrt((1+cos theta)/(1-cos theta)))+ tan theta =0

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  5. tan ^(-1) ""{(sqrt(1+cos x)+sqrt(1-cos x)}/{sqrt(1+cosx)-sqrt(1-cos x)...

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  6. cos ^(-1) ""((cos x + cos y)/(1+cos x cos y))= 2 tan ^(-1) (tan ...

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  7. (1)/(2)cos ^(-1)""((5 cos x +3)/(5+3 cos x))= tan^(-1)""((1)/(2)tan "...

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  8. tan ^(-1)""(1-x)/(1+x)- tan ^(-1 )""(1-y)/(1+y) = sin ^(-1) ""(y-x)/(...

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  9. If cos ^(-1) x+ cos ^(-1) y= theta , show that x^(2)-2xycos thet...

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  10. If sin ( pi cos theta ) = cos (pi sin theta ), , then sho...

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  11. Prove that , a cos theta + b sin theta = sqrt(a^(2) +b^(2) ) cos ...

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  12. IF 2 cos 4 theta + 9 cos 2 theta -7=0 , then show that , theta ...

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  13. cot ^(-1)""x+cot^(-1)""2x=(3pi)/(4)

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  14. cot ^(-1)x+cot^(-1)(a^(2)-x+1)=cot ^(-1)(a-1)

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

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  16. sin ^(-1) x+sin ^(-1) (1-x) = cos ^(-1) x

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  17. cos^(-1) ""(5)/(x)+cos^(-1) ""(12)/(x)=(pi)/(2)

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  18. 3 cot ^(-1)""(1)/(2-sqrt(3))+cot ^(-1)""x=(pi)/(2)

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  19. sin^(-1)x+sin ^(-1)""2x=(pi)/(3)

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  20. sin ^(-1)sqrt(3)x+sin ^(-1)x=(pi)/(2)

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