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Prove that `tan^(-1)(2/11)+tan^(-1)(7/24)=tan^(-1)(1/2)` |
Answer» LHS `tan^(-1)(2/11)+tan^(-1)(7/24)` `tan^(-1)(((2/11)+(7/24))/(1-(2/11)(7/24)))` `tan^(-1)((2*24+7*11)/(11*24-14))` `tan^(-1)(125/250)` `tan^(-1)(1/2)` RHS. |
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