This is just a practice quiz, but I want to know how to do it for when I take the test. Here is my question:
http://i42.tinypic.com/im3q53.jpg
Thanks!
EDIT: I meant I graphed it as 2(1/cosx) +tanx
convert to sines and cosines
2sin(t) = -1
t= 7pi/6 and 11pi/6
Seems who ever made the answer key was trying to be cute --A and B are coterminal with 7pi/6 and 11pi/6
Technical point -- a stationary point is where the derivative is 0
A critical point is where the derivative is either 0 or undefined
The point is a critical point represents where the sign of the derivative can change signs either where it is 0 or undefined
For example |x| has a critical point at 0 even though it has no derivative there
Also the derivative is undefined at pi/2 which would make it a critcal number also this would make c a viable answer as well