Homework Statement
integral of csc^3(x)cot(x)
Homework Equations
I tried using trig identity 1+cot^2(x)=csc^2(x) but I got result where I canceled my indegrals.
The Attempt at a Solution
I tried to substitute the above mentioned indentity for csc^2 but I end up getting -cscx +...
Yup. Today in class I realized how stupid was what I wrote here last night. :blushing:
I guess, for some reason, I assumed that because there is that 2x regular cos formula for derivative doesen't apply.
Thanks for help. I appreciate it.
Got the first one too. Thanks for the help. It would help if we actually learned the derivative of cos(2x), but since we didn't and it is nowhere in the book I just assumed we don't need to use it. Well...I certainly do feel better now.:smile:
Homework Statement
I need to find the integral of (e^3x)cos(2x)
Homework Equations
The Attempt at a Solution
I tried using different trig identities for cos(2x) to get a better equation and then tried to do few versions using the integration by parts but they all kept getting...
So I need to find the derivative of the inverse function. I know that f is one-to-one and is continous. Also I know that f'(x)=1+[f(x)]^2. I found the inverse writing my equation like f(x)=x+(1/3)[f(x)]^3 then I switch the variables and get that my inverse function=(1/3)x^3 - x. Then I just take...
Alright, so I need to find f(x+h) which would be f(10+0.3), with 0.3 being change in x. Using my notes...I see that I could make my equation look like f(x+h)=f(x+(1+(h/x))), where I would break it so that it looks like f(x+h)=f(x)+f(1+(h/x)). I would then substitute 2.30 for f(x), 0.3 for h and...
So the problem says "Taking ln10=2.30 estimate ln10.3 using differentials."
The only thing I thought of doing was to set an integral from 1 to 10.3 with 1/x being the equation I integrate, but I'm not sure if that is right. Any help?
Well, I guess I'll have to become independent and find myself a job quickly. Damn, I told my parents to move to Illinois, but for some reason they like NC. This sucks!
Well, a just got into the University of Chicago, so I have some decisions to make. I'm still the closest to Illinois, because it has engineering and from what I hear here it is a nice school (I'm Serb so drinking part is a big plus in my world), but you know Fermi Lab and 26 Nober Prize Winners...
Well you seem to be pretty bright guy, so just keep up the good work, and take as many AP courses as you can, because any university likes to see someone work hard. The fact that you came from Colombia and wl help you a lot.
Well it depends. Take my advice because I am in very similar situation as yourself. I came to U.S. 3 years ago, and went from ESL I to AP English IV in 2 years, also went from Algebra I to Calc in about 2 years. My GPA is something like 2.9 WEIGHTED and I still got into the University of...
Well my problem with electronics is that the stuff you do is small and you don't see much, while the power engineering is a lot about the generators, and power plants, and big stuff. I think it is fair to say that I'm more interested in the physics of electricism and electromagnetism, but I...
Hi, I got accepted to Purdue and University of Illinois at Urbana-Champaign, both in Electrical Engineering. Now it it would be time to decide which one to pick, and I have some trouble doing that. I mean I'm mostly interested in studying Power Engineering and maybe minor in physics. So I would...
Trust me doctors have to study A LOT! I don't know if you ever saw their anatomy books and how detailed that crap is. I would bet that it takes just as much studying to become a doctor as to become a Physics Profesor. Lawyers? Well in my oppinion they are an important part of our society since...
The problem says that if y=e^nx, then d^ny/dx^n=?
I got that the result is n^2e^nx, but it is not among the offered choices. Can someone tell what did I mess up? Thanks.
Alright, here is the problem.
For all real numbers x, f is differentiable function such that f(x)=f(-x). Let f(p)=1 and f'(-p)=5, for some p>0
a) Find f'(-p)
b) f'(0)
c) If L1 and L2 are lines tangent to the graph of f at (-p,1) and (p,1) respectively, and if L1 and L2 intersect at...
I have similar problems. My parents support me in whatever I choose but they expect too much. My dad is electronics technician so we kinda have similar interests. I always did better in social sciences, I'm even in an academic team, and last year I was in an allstar team, but I can't deal with...
He did that but it took not only the fact that he was genius, but also 15 hours of studying a day. I know a guy who is going into medical school and electrical engineering at the same time, but he studies all day, every day, last 5 years. Double majoring is more than enough, and I think that if...
Don't drop it to regular class. From my experience I can tell you that math is not much different, but teachers are usually better in honors classes, so are people around you, which can be very important. Try tutoring, and make sure you pay attention on class. Good luck!
f(x)=e^cosx
equation for the axis of symmetry?
I got x=pi
f(x)=ln(x^2 - 20)
describe symmetry??
I got symmetric arround y axis.
inverse??
I got y=sqr of ((x/ln) +20)
f(x)=ln(x^2)
Inverse?
I got y= sqr of (x/ln)
Well my experience with work was pretty bad. Not academically but phsycologically. That is probably just me. I'm somehow alergic to work, and I would be very nervous when I have to go to work. I just hated it. Customers would never stopp coming. Yall should have seen my face when I quit. That...
Damn. I hope I'm more excited about my career once I graduate. If it is not a problem could you tell me how did you decide to study something you hate so much now?
Good luck man!
Don't give up!