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" fra effer "(2tan^(-1)(1)/(2)+tan^(-1)(...

" fra effer "(2tan^(-1)(1)/(2)+tan^(-1)(1)/(7)=tan^(-1)(pi)/(17))

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

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

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))

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) .

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)