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" 9."tan^(-1)(2)/(3)=(1)/(2)tan^(-1)(12)...

" 9."tan^(-1)(2)/(3)=(1)/(2)tan^(-1)(12)/(5)

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Prove that: (tan^(-1)2)/(3)=(1)/(2)(tan^(-1)(12))/(5)

Prove that "tan"^(-1)(1)/(4) +"tan"^(-1)(2)/(9) =(1)/(2)"tan"^(-1)(4)/(3) .

Prove that tan^(-1)""(1)/(4)+tan^(-1)""(2)/(9)=(1)/(2)tan^(-1)""(4)/(3)

show that tan^(-1)( (2)/(3)) = (1)/(2) tan ^(-1)( (12)/(5))=

Prove that 2tan^(-1)((2)/(3))=tan^(-1)((12)/(5))

Prove: tan^(-1)(2/3)=1/2tan^(-1)(12/5)

Prove: tan^(-1)(2/3)=1/2tan^(-1)(12/5)

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

Prove that. tan^(-1)((1)/(4)) +tan^(-1)((2)/(9)) =(1)/(2) cos^(-1) ((3)/(5)) .

Prove that: tan^(-1)((1)/(4))+tan^(-1)((2)/(9))=(1)/(2)cos^(-1)((3)/(5))