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[" 3."tan^(-1)(2)/(11)+tan24],[" 4."2tan...

[" 3."tan^(-1)(2)/(11)+tan24],[" 4."2tan^(-1)(1)/(2)+tan^(-1)(1)/(7)=tan^(-1)(31)/(17)]

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2Tan^(-1)(1)/(3)+tan^(-1)((1)/(7))=

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

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

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

2tan^(-1)((1)/(5))+tan^(-1)((1)/(8))= tan^(-1)((4)/(7))

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

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

Prove that 2"tan"^(-1)(1)/(2) +"tan"^(-1)(1)/(7) ="tan"^(-1)(31)/(17) .

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

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