can someone solve this for me?
dy/dx = 2tanx + 2xsec²x
find the gradient at x = pi/4
i get the 2tanx = 2 but 2pi/4(sec²pi/4) = ??
Last edited by Daniel123 (2008-03-16 04:29:00)
Finding the gradient just means finding the slope or the value of the derivative (dy/dx) at the specified x value.
So if you have:
This is the same as just plugging in the x:
Last edited by LuisRodg (2008-03-16 04:02:03)
Luis, you need to use lower case \pi.
Thanks Daniel. I *always* have problems with this latex lol!
What is this "a-level" you put in the topic?
British Secondary School (High School) System:
AS and A level are two different levels of qualifications. They are completed in the last two years of Secondary School, before University.
Ages 16-17: AS level
Ages 17-18: A level
Students usually choose 4 AS level subjects, and then the same 4 (or they often drop one and take 3 of the 4) for A level.
Last edited by Daniel123 (2008-03-16 04:46:03)
Does this constitute an "Advanced" program or is this the general educational setup for everyone?
I live in the US, and back when I was in High School I was part of the IB program (International Baccalaureate) which in fact is an European program and it had a similar setup in the sense that you chose 3 HL (Higher Level) and 3 SL (Standard Level) classes. But this was in the same year.
Last edited by LuisRodg (2008-03-16 04:55:45)
Yes, AS stands for "Advanced Subsidiary", and A for "Advanced".
Students are not required (yet) to stay in school to do these qualifications.
Out if interest, do you pronounce your name "loois" or "looeey"?