x=t-2sint, y=1-2cost
show that the curve crosses the x axis where t=pi/3 and t=5pi/3
I understand that you have to solve y=0 but alli can get is t=pi/3
![]() |
x=t-2sint, y=1-2cost
show that the curve crosses the x axis where t=pi/3 and t=5pi/3
I understand that you have to solve y=0 but alli can get is t=pi/3
can't you just put both t's into the equation for y and show that y = 0 and therefor it's crossing the x axis?
Always graph if at all possible.
I could but I don't have access to a graph creator and no be cause that would be the wrong way of answering that qn and I wouldn't get marks, I have to solve y=0 which makes cost=1/2 which makes t=pi/3 but I cannot find out how to make it also equal 5pi/3
I'd say get familiar with the unit circle. This is the properties of the trig functions you should know.
If C=0, then
If C=1, then
If C=2, then
and so on...
Though, anything that exceeds 2Pi you probably can disregard.
Thank you, guess I need to read up on my C3 then
All times are GMT -7. The time now is 03:22 AM. |