Periodic Functions
This is the graph of the csc function.
![](csc.GIF)
csc θ = hypotenuse/opposite side
Explain why this graph doesn't cross the x axis?
The function csc θ can never equal zero and therefore can't cross the x axis.
For csc θ to equal zero and the graph to cross the x axis the hypotenuse would have to equal zero. That is impossible.
The opposite side in csc θ can never equal zero. Why?
The opposite side is the denominator and hence since we cannot divide by zero it can never equal zero.
As the opposite side approaches zero the value of csc θ and hence its graph goes to ± ∞ Why?
What happens at 00, 900, 1800, 2700 and 3600 to the csc?
answer
return
return PCTC