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

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

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

Which of the following is/are correct? tan[cos^(-1)(4)/(5)+tan^(-1)(2)/(3)]=(17)/(6)cos[tan^(-1)(1)/(3)+tan^(-1)(1)/(2)]=(1)/(sqrt(2))cos2tan^(-1)((1)/(3))+cos(tan^(-1)2sqrt(2))=(14)/(15)cos[2cos^(-1)(1)/(5)+sin^(-1)(1)/(5)]=-(2sqrt(6))/(6)

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

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

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

Prove the following: 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))

(1)/(2)tan^(-1)((12)/(5)) is equal to

Solve: tan^(-1)((1)/(2))+tan^(-1)((1)/(3))+tan^(-1)((3)/(5))+tan^(-1)((1)/(7))