jee-main 2021 Q74

jee-main · India · session2_17mar_shift1 Reciprocal Trig & Identities
The sum of possible values of $x$ for $\tan ^ { - 1 } ( x + 1 ) + \cot ^ { - 1 } \left( \frac { 1 } { x - 1 } \right) = \tan ^ { - 1 } \left( \frac { 8 } { 31 } \right)$ is:
(1) $- \frac { 32 } { 4 }$
(2) $- \frac { 31 } { 4 }$
(3) $- \frac { 30 } { 4 }$
(4) $- \frac { 33 } { 4 }$
The sum of possible values of $x$ for $\tan ^ { - 1 } ( x + 1 ) + \cot ^ { - 1 } \left( \frac { 1 } { x - 1 } \right) = \tan ^ { - 1 } \left( \frac { 8 } { 31 } \right)$ is:\\
(1) $- \frac { 32 } { 4 }$\\
(2) $- \frac { 31 } { 4 }$\\
(3) $- \frac { 30 } { 4 }$\\
(4) $- \frac { 33 } { 4 }$