Mathematics

Evaluate the following integrals

can anyone help me with these questions i did them my self and im not sure if my answers are right can u please include solutions on how u got ur answer too thank you A) lnx/x^2 my answer2(lnx)^2

Help in geometry finding area please

http://tinypic.com/view.php?pic=i5dx4x&s=7 what is the formula to find area of 1 -4 how would i find the missing angle of 5 and how would i find 6 & 7 totally confused please help.-1-4 - divide th

How to solve for t in x'(t) = 2√3 cos(3t + 4π/3) with x' = 3

Im working a differential equation and have arrived at the form: x(t) = 3 = 2√3 cos(3t + 4π/3) I need to find t when x = 3. Per wolfram alpha (http://www.wolframalpha.com/input/?i=3+%… it is:t = 2πn

Dot product , expand and simplify

Hi , i am stuck on my calculus hw. The question is just expand and simplity, 1,(4i-j) *janswer= -1 2,k*(j*-3k)answer= -3 i dont get on he got this answer thx,.-Another way to look at these problems

Is there a name for this formula

I was trying to come up with a formula for some numbers I was working with on Excel.I have one value (x) and another value (y).I need to add x + (x + y) + (x + y*2) + (x + y*3) + (x + y*4).... and thi

Help in geometry perimeter of odd shape

http://oi52.tinypic.com/i71xti.jpg what would the formula like objects for this be?-Youve got three sides of a rectangle and half a cicle. ( 14.7 x 2) + 10.7 + (10.7 Pi/2)-Hmm.. Interesting! I think

What happens when the radius of a circle is drawn through the midpoint of a chord

The chord and the radius of the circle meet at right angles. Do you need to prove this? If you do draw two radii to the endpoints of the chord. Show the two triangles to be congruent because they have

Integrate ln(x^2) please, thanks!

Please show all the working as Im not really sure about the integration of the natural logarithm, other than that integration ln (x) = x ln(x) - x ( + c). Thanks!-Use the formula you already have: ln

Tell which term you would add or subtract on both sides of the equations so that the variable is on 1 side

6x+2=1x-Either: subtract 6x on both sides to get 2=-5x or subtract x on both sides to get 5x+2=0 and then subtract 2 on both sides to get 5x=-2 both give the same answer.-i would subtract 6x so it

Word Problem involving work

If a farmer can plough a field with a tractor in 4 hours, what fraction of the field is ploughed in 1 hour? If the farmer uses his new tractor the same field could be done in 3 hours. How long would i

Help maths 10 points

allright this is not my ****** home work iam serious i have an exam tommorw and id really appreaciate it if you could help me with this question please click on the link http://www.xtremepapers.me/CIE

Short maths question help!

This question i am stuck on for like 2 days. So what i have to do is try to work this question out but provide working out every step i get an answer. -3 x 5 + 6 (divide) -3 x -2 - 4 + (square root)2

Help on a maths question!! please

This is also a hard question i am stuck on. Please make my day by providing a correct answer. (Please provide answers with different operations and please do not use +, -, *, / over and over again)

Working with linear operators

The linear operator T({a,b},{c,d}) = a+d. a) Show that T is linear b) Determine the dimension of kerT and give a basis of kerT c) Find the basis for a complement to kerT d) Putting together the basis

Gcse maths question help please

Basically I dont know how to work this out! My exam is in a week and a day so I want to make sure I can work this kind of q out. [A cylinder has a base radius x cm and height 2x cm A cone has a bas