Solve the Equation for Exact Solutions $\arctan x = \operatorname { arccot } \frac { 7 } { 16 }$

Multiple Choice

Solve the equation for exact solutions.
- $\arctan x = \operatorname { arccot } \frac { 7 } { 16 }$

A) $\varnothing$
B) $\{ 0 \}$

C) $\left\{ \frac { 7 } { 16 } \right\}$

D) $\left\{ \frac { 16 } { 7 } \right\}$