Subtract from both sides of the equation.

Reorder and .

Factor out of .

Factor out of .

Factor out of .

Set the factor equal to .

Graph each side of the equation. The solution is the x-value of the point of intersection.

, for any integer

, for any integer

The solution is the result of .

Exclude the solutions that do not make true.

, for any integer

Solve for u cot(pi/2)-u=tan(u)