1.

Prove statement "tan"^(-1)((a-b)/(1+ab)) +"tan"^(-1)((b-c)/(1+bc)) ="tan"^(-1)a-"tan"^(-1) c.

Answer»

SOLUTION :"TAN"^(-1)((a-B)/(1+ab)) +"tan"^(-1)((b-C)/(1+bc))
`="tan"^(-1) a- "tan"^(-1)b+"tan"^(-1)b-"tan"^(-1)c`
`"tan"^(-1)a-"tan"(-1)c`


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