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tan^(-1)(2/9)-tan^(-1)(1/4)=?...

`tan^(-1)(2/9)-tan^(-1)(1/4)=?`

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tan^(-1)(1)/(4)+tan^(-1)(2)/(9)=tan^(-1)(1)/(2)

Evaluate 2tan^(-1)(1/2)+tan^(-1)(1/4)

tan^(-1)((1)/(4))+tan^(-1)((2)/(9))=tan^(-1)((1)/(2))

The value of tan^(-1)((1)/(3))+tan^(-1)((2)/(9))+tan^(-1)((4)/(33))+tan^(-1)((8)/(129))+...n terms is:

PT tan^(-1)(3/4)+tan^(-1)(1/3)=tan^(-1)(13/9)

Prove that : tan^(-1)(1/2) + tan^(-1)(1/3) = tan^(-1)(3/5) + tan^(-1)(1/4) = pi/4

tan^(-1)(1/7)+tan^(-1)(1/9)+tan^(-1)(1/8)

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