# Recent content by frenkie

1. ### Can roots be at the same points as POI's?

can roots be at the same points as POI's? because when I set my original equation to zero and I set my second derivative equation to zero i get the same answer? is it possible that roots can be same as the POI's.
2. ### End behavior

thank you very much guys..appreciate your help...
3. ### End behavior

also, are there any interesting points in the graph of sin(x/2)...my last question.
4. ### End behavior

and why is it oscillatory?
5. ### End behavior

I wish i knew what that looks like? is there a picture anywhere? sorry if thats too much trouble.
6. ### End behavior

is y=sin(x) the end behavior of y=sin(x/2)?
7. ### Cos(x/2)/2 is my derivative

is there any interesting points in the graph of sin(x/2)?
8. ### Cos(x/2)/2 is my derivative

oh nvm my PIO is o and positive and negative 2pi? correct?
9. ### Cos(x/2)/2 is my derivative

or pi/2? getting confused all over again.
10. ### Cos(x/2)/2 is my derivative

pi and 2pi which means that x=pi?
11. ### Cos(x/2)/2 is my derivative

I'm not sure how to solve for x when i set my second derivative equal to 0. -1sin(x/2)/4=0 if i do PEMDAS in reverse i get sqrt2/1 multiplied by 4 but i don't think its right
12. ### Cos(x/2)/2 is my derivative

the teacher said that it would be alright if the domain iz [-2Pi, 2Pi] so i think that -Pi and Pi are the x values...which means that -Pi is a min and Pi is a max and 0 is a PIO.? do u agree?
13. ### Cos(x/2)/2 is my derivative

x=Pi? i'm making this way too hard then it actually is.
14. ### Cos(x/2)/2 is my derivative

cos x is zero at Pi/2 and 3pi/2 on the unit circle so when i plug these two numbers into x in my derivative equation i get o for the answer so x is Pi/2 and 3pi/2?
15. ### Cos(x/2)/2 is my derivative

cos(x/2)/2 is my derivative. and when I set it equal to 0, i try to solve for x. so cos(x/2)/2=0 cos(x/2)=0/2 this is the part where i'm stuck...a friend of mine did the rest and he came up with whats on the bottom, but I don't know how he did it or if its right...help? cos x=sqrt2/2