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Show that "tan"^(-1)1/2+"tan"^(-1)2/11="...

Show that `"tan"^(-1)1/2+"tan"^(-1)2/11="tan"^(-1)3/4`

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

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Prove that : "tan"^(-1)1/5+"tan"^(-1)1/7+"tan"^(-1)1/3+"tan"^(-1)1/8=pi/4

Prove the following : 2"tan"^(-1)1/2+"tan"^(-1)1/7="tan"^(-1)31/17

Prove the following : "tan"^(-1)1/4+"tan"^(-1)2/9="tan"^(-1)1/2

Prove : "tan"^(-1)2/11+"tan"^(-1)7/24="tan"^(-1)1/2

Prove the following : "tan"^(-1)2/11+"tan"^(-1)7/24="tan"^(-1)1/2

Prove the following : "tan"^(-1)2/11+"tan"^(-1)7/24="tan"^(-1)1/2

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

Show that ( tan^(-1) 1 + tan^(-1) 2 + tan^(-1) 3) = pi