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#1 2008-03-16 01:06:59
- q8boy
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trigo (a-level)
can someone solve this for me?
dy/dx = 2tanx + 2xsec²x
find the gradient at x = pi/4
#2 2008-03-16 01:09:18
- q8boy
- Guest
Re: trigo (a-level)
i get the 2tanx = 2 but 2pi/4(sec²pi/4) = ??
#3 2008-03-16 03:50:00
- Daniel123
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- Registered: 2007-05-23
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Re: trigo (a-level)
Last edited by Daniel123 (2008-03-16 04:29:00)
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#4 2008-03-16 03:51:35
- LuisRodg
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Re: trigo (a-level)
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)
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#5 2008-03-16 03:54:21
- Daniel123
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Re: trigo (a-level)
Luis, you need to use lower case \pi.
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#6 2008-03-16 04:02:55
- LuisRodg
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Re: trigo (a-level)
Thanks Daniel. I *always* have problems with this latex lol!
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#7 2008-03-16 04:15:36
- q8boy
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Re: trigo (a-level)
thanks guys 
#8 2008-03-16 04:28:06
- LuisRodg
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Re: trigo (a-level)
No problem.
What is this "a-level" you put in the topic?
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#9 2008-03-16 04:34:43
- Daniel123
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Re: trigo (a-level)
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.
Generally,
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)
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#10 2008-03-16 04:50:24
- LuisRodg
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Re: trigo (a-level)
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)
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#11 2008-03-16 05:05:14
- Daniel123
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Re: trigo (a-level)
Yes, AS stands for "Advanced Subsidiary", and A for "Advanced".
Students are not required (yet) to stay in school to do these qualifications.
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#12 2008-03-16 07:32:26
- Daniel123
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Re: trigo (a-level)
Out if interest, do you pronounce your name "loois" or "looeey"?
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#13 2008-03-16 12:01:12
- LuisRodg
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Re: trigo (a-level)
"loois"
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#14 2017-03-17 16:24:01
- Monox D. I-Fly
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Re: trigo (a-level)
Out if interest, do you pronounce your name "loois" or "looeey"?
"Luis" can be pronounced as "Looeey"?
Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.
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