On the graph of f(x)=cotx and the interval [−2π,0), for what value of x does the graph cross the x-axis? Choose all answers that apply.

Question

Select all that apply:

1. −2π
2. 
   
3. −3π/2
4. 
   
5. −π
6. 
   
7. −π/2
8. 
   
9. −π/4

Answer 1

Since cot is the same as cos/sin cot will equal zero whenever cos=0 which is at -pi/2 and -3pi/2