Help with a difficult precalculus diagram?
Can someone please help me with how to draw a diagram for this problem? I just need some help with that and I should be able to solve for the rest myself. A Forest Service helicopter needs to determine the width of a deep canyon. While hovering at position B, they measure the angle of depression to position D 42 degrees, then descend vertically 400 feet to position A and measure the angle of depression to position D 37 degrees. The measure of ∠EAD = 13 degrees. a) Complete the drawing of the diagram (label all given data). b) Determine the width |ED| of the canyon to the nearest tenth foot.
Can anyone help me with pre-calculus functions problems?
Ok, these questions are all fairly similar, so I'm not going to go over each one individually.Several are giving you varients of x^2. Normally, this function isn't one to one. In this case, that means there is more than one input that gives the same output (e.g. -2^2 and 2^2 both output 4). In order to make the function one-to-one, all we have to do is say x≥0 OR x≤0. So we either say that we can only have positive imputs and 0(which is probably the answer they want) or we can only have negative inputs and 0.What if it's something like 4x^2 instead? Just set 4x^2≥0 and solve the inequality. The answer should always be in terms of x, not 4x^2. That's why you need to isolate x in the inequality.You then are supposed to restrict the domain of the inverse function to make it one-to-one. The squareroot function normally refers only to the positive sqrts. This is what they want, not the negative sqrt function (neither is really more correct, but it's convention to go with the former).They also most likely want you to restrict the domain so that you take the square root of a positive (sqrts of negatives are defined, but they aren't part of the real number system they want you to work with). So, for example, if you have the function 2x^2-10, to find the inverse function you need to set 2x^2-10≥0 and solve for x. 2x²≥10 ⇒ x²≥5 ⇒ x≥√(5). This would make your inverse function √(2x²-10) where x≥√(5).You also have problems with composite functions. That's what f circle g means (i.e. f(g(x)). That might look confusing but it's actually fairly simple. Say f(x)=x+5 and g(x)=x³ f(g(x)) would be x³+5. So if for those problems, just get your composite function and then proceed as normal.I hope this helps! Feel free to ask follow-up questions in the comments. :)Also, check out these websites. They are very helpful when learning math:Math is Fun, Khan Academy, Math lessons that click, Purplemath | Home
For someone who finished precalculus, is Physics C AP or Physics 1 AP harder? I heard that you should take calculus before Physics C, but I also heard that Physics 1 is extremely hard.
I teach AP Physics 1, and I have taken the class to teach APPC. I can tell you unequivocally that APPC is ‘harder’ in that it requires you to actually do the math, which is calculus based.APP1 is supposedly algebra-based, but it is really now conceptual level, with very little math. You should be able to solve simple conversion problems with units and it is helpful to understand sine and cosine, which most US students get in a geometry class. Other than that, some limited understanding of vector addition (two dimension) can be obtained during the class, and that is all the math you will see. Three quarters of the course is mechanics, then you see a brief overview of waves and electrical circuits.APPC (Mechanics) requires you to actually know how to take derivatives and integrals and (for many teachers) vector addition in three dimensions. Although a few teachers are willing to teach this math in the physics course, most are not and require calculus as a pre- or co-requisite. APPC (Electricity and Magnetism) is taught as a separate course, and requires even firmer math understanding.APPC corresponds to what most post-secondary schools call “University Physics” while APP1 is content-similar to the first semester of “College Physics”. If you are going into engineering, mathematics, or physics (and a few other areas, check with your local college) you eventually will have to take the higher calculus-based physics. My school is too small to offer both, so I made the decision to offer only APP1, but get dual enrollment credit for the students. That way the engineering students have credit for College Physics, and some insight into the content for University Physics they will take later, and the majority of my students that are not going to need the calculus, can get the credit for the college Physics and not have to retake it in college.
Is Pre-Calculus hard to take online?
Everyone is different. It can be difficult to stay on track in online classes since you don't have a professor to remind you assignments are due. You also don't get the benefit of asking questions in person. I have also dealt with people working on the online course and I really dislike the way you do homework on their online program. It seems to make the homework take a lot longer. Precalculus is pretty much a little more advanced algebra and trigonometry that may or may not be used in calculus. I have only taken college calculus for engineering majors where we did proofs and a little more problem solving than the calculus for life sciences so I can't say how the AP calc course will be.
I need help with some pre calculus problems and i'd really appreciate it?
Well, I don't want to do your homework for you, but most of your questions can be answered knowing that: 1 radian = 57.3 degrees ------> 57.3 deg/rad = 1 (unitless) So to help with one of your questions: 1) 18 degrees * (1 rad/57.3 degrees) = 0.314 rads Notice how the unit "degrees" in"18 degrees" cancels with the "degrees" unit in "57.3 degrees" and only leaves you with the units of radians. The only thing that was done was to multiply by the number 1, i.e. the conversion factory I mentioned above. Multiplying 18 degrees by 1 doesn't change anything, except the units. The rest should follow easily.
How hard is precalculus in hs?
If you are asking about how hard Pre-Calculus is in high school, it is not hard.It is just a more tedious version of Algebra, where you deal with ugly fractions and decimals and do more complex factoring and stuff like that. You will learn some new topics, like trigonometry, long division of polynomials, remainder theorem, and limits, but you will probably not learn these until the second half of the semester. If you want to prepare, practice not using your calculator when you do algebra problems, know your algebra material pretty well, be comfortable dealing with fractions, and learn basic trigonometry (like sin = opposite/hypotenuse, cos = adjacent/hypotenuse, and tan= opposite/adjacent) from Khan Academy or some other site.Question's from my first few assignments in Precal:Graph: f(x) =-|x+3|+4Find inverse of f(x) = 3-x, and g(x) = (2x+3)/(5x+4)What’s the domain and range for f(x)=√xThe domain for f(x)= (1)/(x-2)If you are worried about not doing well in the class, don’t be. The worst that could happen is that you don’t understand the material, but there are always resources, like your teacher, and you tube, so you’ll do fine :)Best Regards,Barkot
I failed Precalculus?
It's honors precalculus, so its a more difficult math course, but i refused to drop down to normal precalculus because i need to know precalculus for me major, and i feel that if you arent taking honors level courses, you arent very smart (all my classes are honors level, by the way). Today was the final, and i needed a 70 on it - i didnt get anywhere close to that - im sure because i didnt even finish. I took too long on the multiple choise, which was a big mistake. I am a senior and already in college, but this is really eating away at me because i've never gotten lower than a B in a class, let alone an F ! Do you think my college (Drexel U.) will reject me. Should i be worried? Will anyone ever see these grades? employers, grad. school, etc? This is really depressing, i dont even want to walk at graduation, or do anything anymore. I'll admit first two quarters i didnt try (and both quarters i failed), and then i tried 3rd quarter (got a D+) and fourth quarter (went into the final with a 64%). It's not necessarily that i dont get the material, its that i need more time to finish - i never finish my tests. But my teacher doesnt give more time.
Is AP calculus AB hard? I finished honors pre-calculus with a 101% and want to know what I'm getting myself into.
I’d say it’s one of the most difficult AP courses and a big time sink. You really have to dedicate yourself to the class to understand the content, and be able to solve the AP style questions, which can be quite dense.AP Calculus for a lot of people is difficult because it requires students to recall most of the previous math they’ve learned in high school, from algebra 1 to most of pre-calc. This isn’t to say you shouldn’t do AP Calc though, it’s been one of the most fun and engaging classes I’ve had in high school. I’d say, if you’re into math and complex problems, then definitely go for it (and take BC!). It’ll look great for colleges and being able to complete calculus 1 (and 2 if you take BC) might mean you won’t have to take any more math when you do get to college.