What will happen if the bisection method is used with the function f(x) = tan(x) and

a) [3,4]

b) [1,3]

Attempt:

Check the signs of the function:

f(x) = tan(x)

a) f(3)*f(4) = -0.165 <0 => the root is between 3 and

b) f(1)*f(3)= -0.222<0 => the root is between 1 and 3 ,

but this is obviously wrong.

Please, help.