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Simplify [(3sin2alpha)/(5+3cos2alpha)] +...

Simplify `[(3sin2alpha)/(5+3cos2alpha)] +tan^(-1)[(tanalpha)/4] ,w h e r e-pi/2 < alpha < pi/2`

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  7. Prove: tan^(-1)(1/4)+tan^(-1)(2/9)=sin^(-1)(1/(sqrt(5)))

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  11. Solve : tan^(-1)(x-1)+tan^(-1)x+tan^(-1)(x+1)=tan^(-1)3x

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  14. Solve for x : tan^(-1)(x+2)+tan^(-1)(x-2)=tan^(-1)(8/(79)) , x >0

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  16. Solve for x : tan^(-1)((x-2)/(x-1))+tan^(-1)((x+2)/(x+1))=pi/4

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  17. Solve for x : tan^(-1)(2+x)+tan^(-1)(2-x)=tan^(-1)2/3 , where x<-sqrt(...

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