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Advanced Math/Questions Answered by Expert Chen Min
| Subject | Date Asked |
| Volume of a Cone | 3/15/2011 |
| Q: A cone is made by cutting a sector of angle (theta) from a circle with a radius of 1 and gluing the ... A: Firstly, you get the arc length corresponding to the sector cut out: R(theta) It's the circumference ... | |
| Finding the Point of Diminishing Return | 2/17/2011 |
| Q: I just want to ask on how to find the the point of diminishing return if you are given the the total ... A: I wonder who gave you this question. It is clearly not solvable to me. If you treat the two ... | |
| Incomplete Calculation | 2/16/2011 |
| Q: Here is an example calculation: (12/6)/4 X 10 = 2/4 X 10 = 20/4 = 5 Can the same calculation be ... A: I don't quite understand your question. If either y or z is replaced by a number, then there will ... | |
| Incomplete Calculation | 2/16/2011 |
| Q: Here is an example calculation: (12/6)/4 X 10 = 2/4 X 10 = 20/4 = 5 Can the same calculation be ... A: You gave me an equation with two unknowns, y and z. Generally, if the number of equations is less ... | |
| Another Trig Question | 1/27/2011 |
| Q: I'm wondering if you could guide me through another Trig proving question that's really giving me ... A: RHS=(sinx+cosx)(sinx-cosx)/cosx(sinx+cosx) =(sinx-cosx)/cosx =tanx - 1 This one is actually ... | |
| Trigonometry Puzzle | 1/26/2011 |
| Q: I'm hoping you can help me with this question and give me some clues as to how to solve: A patio ... A: Look at the base, surely the height AD extends through the center of it, and the vertically downward ... | |
| INFERENTIAL STATISTIC | 1/19/2011 |
| Q: chen, i need your help,im a 2nd student for answering this 6 problem, this are my assignment, please ... A: This needs a lot of work with GC / Distribution table, besides it's homework, so I'll just give you ... | |
| finance/annuities | 1/18/2011 |
| Q: Jon plans to retire in 5 years and is to receive $10000 at the end of each semiannual period for 15 ... A: I think the question is misleading, and I don't get your answer... From the qns, it seems Jon is ... | |
| Help on the ASVAB | 1/13/2011 |
| Q: I'm retaking the casaba and i score very well on everything besides on Antiemetic reasoning and math ... A: I don't know what's a casaba...a fruit?? Anyway,back to your question. I assume the 100 dollar bill ... | |
| Modulus function | 1/7/2011 |
| Q: I am a maths tutor in England and I am having a lot of trouble understanding |y|=2x-3. I understand ... A: For |y|=2x-3, it's easy. 1)Draw out y=2x-3 2)Erase everything below x-axis, so the value of the ... | |
| 5th grade math | 1/6/2011 |
| Q: "write the rule for each given function table below" Input 2 4 7 8 10 Output 3 7 13 15 19 Rule: ... A: It's not actually advanced math Qn....but the hell with it. Since this looks like a homework ... | |
| discontinuity of a limit | 1/4/2011 |
| Q: what is a discontinuity, and how do i approximate it to three decimal places? e.g. ... A: I don't understand what you are asking... Firstly, discontinuity means a sudden jump/drop in the ... | |
| Trigonometry... | 7/2/2009 |
| Q: I was looking at this questions before and they are really hard to understand..i was wondering if u ... A: Well, it is not much of a trignometry Qn, I'd say. Sorry that I had no idea about the rational zero ... | |
| Integration & Induction | 1/9/2009 |
| Q: I'm not sure whether you would have covered integration yet, but if you have I have this question ... A: Sorry for the lateness, cuz I was busy about my graduation ceremony:) I believe these two questions ... | |
| problem with Horner method | 12/26/2008 |
| Q: i have a problem with horner method,and want you to just give me a short description about it,and ... A: It's already explained in the web page: Each entry in the second row is the product of the x-value ... | |
| function in math | 12/25/2008 |
| Q: Let ƒ(x)=√(1-x^2 )∈R.the maximum domain for which ƒ is defined is [-1,1], Since ... A: Here, since f(x) is defined under real domain (∈R), so the chunk under the square root sign ... | |
| function in math | 12/24/2008 |
| Q: please tell me what is function? A: Function is like an answering machine.You input a value for the required independent variable, and ... | |
| Law of Cosines / Sines Critical Thinking Question? | 12/19/2008 |
| Q: How far from the horizontal must a sheet of plywood 48 inches wide be rotated to fit through a ... A: It seems you have problem in constructing the math model. You need to analyse it first: a plywood ... | |
| geomatry | 12/18/2008 |
| Q: what is use of sin,cos,cosec,cot?why wwe are using it?also please write me what are the properties ... A: This question is rather general, but I'll try to explain it. Trigonometry is about the six ... | |
| trig | 12/16/2008 |
| Q: sec 30 degrees / cos 30 degrees A: It should be a homework question, right? Remember this hexagon: sin -- cos / ... | |
| Proof by Induction | 12/14/2008 |
| Q: asub1=1 asub2=4 asub3=9 I know you have to prove P(1) first. Then assume P(K) then P(k+1). If you ... A: Assume P(n) holds true, then prove P(n+1) also holds true. Since n^2 = (n-1)^2 - (n-2)^2 + (n-3)^2 ... | |
| Calculus help | 12/12/2008 |
| Q: Sketch the following function without the use of a graphing calculator. Show all work for and ... A: I cannot do the sketch for you, and you should do such basic job yourself.Besides, what is a ... | |
| Discrete Mathematics | 10/30/2008 |
| Q: Find the minimum and maximum values of z = 3x + 4y for each of the following sets of constraints. x ... A: Obviously your single constraint is far from enough. Hence I assume one more constraint,i.e.x>0 and ... | |
| help with a bouyancy calculation | 10/30/2008 |
| Q: I'am trying to find the buoyancy of a pipe 8'' diameter by 10' long it weighs 42 lbs. Is there any ... A: I assume that you mean the resultant buoyant force, so the weight of the pipe can be used in ... | |
| Probability | 5/18/2008 |
| Q: The owners of Superb Coffee want to buy 100 bags of coffee from Great Aroma. They take a sample of ... A: There are ten bags that are not able to meet the requirements Atmost one bag can be in the samples ... | |
| Trignometry | 5/7/2008 |
| Q: if sinx=3cosx, what is the value of sinxcosx. Where do I start? A: A very simple way is to get tan value of x; tanx = sinx / cosx = 3 So, sinxcosx = 0.5 sin2x = 0.5* ... | |
| application of quadratic equations | 5/5/2008 |
| Q: 1. Some students planned for a get-together. The budget for food was $5... Five of the students ... A: 1.Assume there were x students to come in the plan, the total food price = 5x the actual number ... | |
| analytical geometry | 5/2/2008 |
| Q: pls do help me i had finish answering the number 11 question but i cant answer #12 letter c is ... A: You're welcome.Helping you is my pleasure:) This is quite an interesting question...All the choices ... | |
| Logs | 4/30/2008 |
| Q: Write the following expression as a single logarithm. If you could show me the steps that would be ... A: I'll give you two hints: The number in front of log can be placed behind the log sign as the power ... | |
| integration by parts | 4/29/2008 |
| Q: A particle that moves along a straight line has velocity v(t)=t^(2)*e^(-3t) meters per second after ... A: My answer is -( 1/3 ) * ( t^2 + (2/3)t + 2/9 ) * ( e^(-3t) ) + 1/3 I don't know if this is correct ... | |
| verifying identities | 4/7/2008 |
| Q: (sinx/1-cosx)-(sinx/1+cosx)= 2cotx I'm getting stuck with this problem because I am not getting the ... A: It's easy,actually. sinx/(1-cosx) - sinx/(1+cosx) =(sinx + sinxcosx - sinx + sinxcosx)/(1 - ... | |
| Trigonometric Inverses with variable | 4/4/2008 |
| Q: Sin [csc^-1 (1/7x-8)] sin [cot^-1 (1/x+8)] How to do those? I know how to deal with sin[csc^-1 ... A: I saw your question in the pool and I think I may offer some help For the first part,you must know ... | |
| Algebra | 4/2/2008 |
| Q: Factor completely 1.) u^2-5uv+6v^2 2.) 9x^2-23x-12 Is there any way you could also explain to ... A: I believe this question does not fall into the A Math category... Anyway, I'll help you out. The ... | |
Advanced Math
Answers by Expert:
Chen Min
Top Expert on this page
Expertise
All the conceptual questions, pure math & basic stats alike I am good at answering your algebra (including logarithm, functions, trigonometry) and geometry questions. I can also provide to you a firm understanding into basic calculus and other mathematical ideas and concepts. You can either ask questions in English or Chinese. Physics Qns that require rigorous math are also welcomed Important:Please avoid asking me questions related to economics.After all, I am only a secondary school student
Experience
A lot of participation in Math Olympiad Competition with numerous awards (Not always gold, though) CMO Gold, SMO Silver, SPhO Gold
Education/Credentials
So far, nothing.
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