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Show that : tan^(-1 ) ( 1/2 ) - tan^(-1...

Show that :
`tan^(-1 ) ( 1/2 ) - tan^(-1) (2/9 ) = tan^(-1) ( 1/4 )`

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

Show that 2 tan^(-1)(1/2)+tan^(-1) (1/7)=tan^(-1)(31/17)

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

Show that tan^(-1)(1/2)+tan^(-1) (1/3)= pi/4 .

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Show that ,,tan^(-1)(1)/(2)+tan^(-1)(2)/(11)=tan^(-1)(3)/(4)

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

Prove that tan^(-1). 1/7 + tan^(-1). 1/13 = tan^(-1). 2/9

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