Mathematics - 18 December 2007

Simplify (4x3/2x^2)^-4

2007-12-18 01:38:26 · 4 answers · asked by Anonymous

Karen, David, Jenny, George, and Sam are in a band. They need to choose a guitarist, a piano player, and a drums player.
a) Make a tree of the possible choices for these 3 positions. (if possible)
b) In how many ways can the 3 positions be chosen?
c) What is the probability that Jenny is chosen to play the piano?

2007-12-18 01:13:00 · 1 answers · asked by Anonymous

hi

i'm tryna work out how to do modular arithmetic, lets say I have

a = 0.5 mod(5)

how can I calculate what a is?

thx

2007-12-18 01:05:17 · 2 answers · asked by Anonymous

2007-12-18 01:05:05 · 8 answers · asked by PETER M 1

2007-12-18 01:04:19 · 13 answers · asked by love4music 1

2007-12-18 00:57:53 · 30 answers · asked by Anonymous

2007-12-18 00:26:10 · 17 answers · asked by Anonymous

2007-12-18 00:15:59 · 7 answers · asked by rohit p 1

Hi,

I need to evaluate the integral of sin^3(2x)dx.

I started by using the power-reducing formula to turn sin^2 x into (1-cos 4x/2) and multiplying that by sin 2xdx.

So I have: ⌡ (1-cos 4x/2) (sin 2x) dx

Then I took the 1/2 out front to get:
1/2 ⌡ (1-cos 4x) (sin 2x) dx

Then I distributed the sin 2x out to get:
1/2 ⌡ (sin 2x - sin 2xcos4x) dx

Well, I wanted to use u-sub. with u = sin 2x and du = 2 cos 2x, but as you can see, I have cos 4x. How would I complete this problem (if I was on the right track in the first place)?

Thanks for the help! :>)

2007-12-18 00:15:48 · 6 answers · asked by LLH 2