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tan^(-1)((1)/(4))+tan^(-1)((2)/(9))rArr...

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

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

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

tan^(-1)((1)/(4))+tan^(-1)((2)/(9)) is equal to :

tan^(-1)((1)/(4))+tan^(-1)((2)/(9)) is equal to

tan^(-1)((1)/(4))+tan^(-1)((2)/(9)) is equal to :

"tan"^(-1)((1)/(3))+ "tan"^(-1)((2)/(9)) + tan^(-1)((4)/(3^(3))) + ....oo is equal to

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))

The value of tan^(-1)((1)/(3))+tan^(-1)((2)/(9))+tan^(-1)((4)/(33))+tan^(-1)((8)/(129))+...n terms is: