Mathematics - 25 July 2007

Express
cot^2 x-1
csc^ x
in terms of sin x

2007-07-25 18:14:35 · 3 answers · asked by Peter 1

Hi.

I'm trying to find the critical points for the function :

f(x)= x sqrt(x - (x^2))

I don't seem to know what to do after using the product rule with chain rule...

I got:

[(x(1-2x))/(2 sqrt(x-x^2))] + sqrt[x-x^2]

Can anyone show me the steps on how to proceed with this? I would be super grateful.


Thanks!!

PS: I know the answer is 0 and 0.75 --> I need to know the steps.

2007-07-25 18:13:48 · 2 answers · asked by Anonymous

, give the equation of the quadratic function, and state what the x and y in the application represent. Choose at least two values of x to input into your function and find the corresponding y for each. State, in words, what each x and y means in terms of your real-life application.

Is there any other examples you can think of besides Ball dropping? or trajectory or determine Max ORD or maximum ?
I need a real life example with the equation and answer.

2007-07-25 17:57:30 · 3 answers · asked by Anonymous

Hi.

can someone help me with this?

I know that

(sqrt [a] - a) X (sqrt [a] - a) = (a - a^2)

but when I multiplied it out using FOIL, I got:

a - 2a^(3/2) + a^2 which does not equal (a - a^2)

I used a as the variable instead of x or else the multiplication sign would be confusing.

Please help me figure out what I did wrong here.


Thank you.

2007-07-25 17:43:26 · 7 answers · asked by Anonymous

2007-07-25 17:36:07 · 5 answers · asked by BJ G 1

2007-07-25 17:32:47 · 5 answers · asked by cmc 1

2007-07-25 17:31:38 · 4 answers · asked by kajal 1

Are you good at math? Complete the last two in this sequence: 1=3, 2=3, 3=5, 4=4, 5=4, 6=3, 7=5, 8=5, 9=4, 10=3, 11=?, 12=?

2007-07-25 17:30:29 · 5 answers · asked by Anonymous

stuck on these problems
averages (arithmetic mean)

What is the average of 9 numbers if the sum of any 4 of them is 20?
a) 20/ 9 b) 4 c) 5 d) 6 e) 36

If a = 2b and b = 3c and the average of a, b, and c is 40, what is the value of a?
a) 6 b) 12 c) 24 d) 36 e) 72

plz show work or explain

2007-07-25 17:27:45 · 4 answers · asked by Anonymous

What are some websites pertaining to numerology and the meanings of numbers?

2007-07-25 17:10:18 · 1 answers · asked by ? 1

2007-07-25 17:09:23 · 17 answers · asked by cmc 1

A Wheel makes 32 revolutions/min. Find in radians the angle through which the wheel turns in 3 seconds. How long will it take to turn 25 degree

2007-07-25 17:04:53 · 4 answers · asked by Kesari 1

Please give me a FORMAL proof. MANY THANKS.
Prove that if a≠0 then |a+(1/a)|≥2

2007-07-25 17:02:03 · 3 answers · asked by gabriel 1

2007-07-25 17:00:01 · 12 answers · asked by cmc 1

2007-07-25 16:51:45 · 10 answers · asked by cmc 1

I dont get how to find the measure of an arc.
http://i15.photobucket.com/albums/a372/cowqtie101/mathgeo.jpg
I dont get why the answer to find the measure of arc BC is 54...and i dont get how to find the measure of angle ADB..HELP

2007-07-25 16:51:16 · 3 answers · asked by Egyptian_princess 1

This should be easy peezy for those of you who are in the 15th grade level.

How would I find out how many MINUTES are in a given month?

Are you able to show / tell how you generated your answer?

Start with July '07.

Good Luck & Thanks Again!

2007-07-25 16:47:51 · 7 answers · asked by earthball50@sbcglobal.net 3

I am just really pressed for time to get all this work done and my little girl is down with a high fever. I just need some help I cannot figure out for the life of me what they are and I am so beat.


A ball is thrown vertically upward, from the top of a building 80 m high with an initial velocity of 10 m/s. After t s, the height h is given by
When is the ball at a height of 65 m?



A ball is thrown vertically upward, from the top of a building 30 m high with an initial velocity of 5 m/s.
After t s, the height h is given by
When does the ball hit the ground?



A ball is thrown vertically upward, from the top of a building 30 m high with an initial velocity of 5 m/s. After t s, the height h is given by
When does the ball hit the ground?

2007-07-25 16:44:19 · 3 answers · asked by kenogirlmd 2

2007-07-25 16:42:18 · 12 answers · asked by cmc 1

2007-07-25 16:37:01 · 7 answers · asked by beeboppinbippity 1

okay welllll i have a algebra 2 math final tomorrow and I really don't know how to do these two problems, just please try to help me as much as you can, thanks if advance! :)

x^2 -2x-8=4

and

1- 4 over x+6 = 4 over x

2007-07-25 16:22:25 · 1 answers · asked by Anonymous

∫1,0 39sqrt(1-x^2)

n=10
n=100
n=1000

2007-07-25 16:22:05 · 2 answers · asked by latina_babygirl002 1

A rectangular storage container with an open top is to have a volume of 10 cubic meters. The length of its base is twice the width. Material for the base costs $12 per square meter. Material for the sides costs $10 per square meter. Find the cost of the materials for the cheapest such container.

2007-07-25 15:51:24 · 6 answers · asked by Anonymous

2007-07-25 15:51:06 · 14 answers · asked by jessie0420 2

how can i factor
1.x^3+1/8

2.) 5x^3+40y^6
my answer is
(4x^4-2xy^2+x)2x
but this is part right.now correct

2007-07-25 15:30:55 · 5 answers · asked by Anonymous

How would I prove that the circumference of an ellipse with equation x^2 + 2y^2 = 2 is the same as the arc length of y=sin(x) on the interval [0,2pi]?

2007-07-25 15:26:06 · 2 answers · asked by Elk n' Fresh 4

what does x^6-y^6
end up to be i used a calculator to do this but
my answer is still incorrect.
x^6+x^3-y^6

and how do you type in
exponets that are like this n-1?will it ben^-1^?

2007-07-25 15:10:40 · 4 answers · asked by yoshi_gurl08 1

2007-07-25 15:07:20 · 7 answers · asked by yonex 1

The equation is (log base 10 3)/10 = [log base 10 (1+r)]

I've tried to use the distributive property but that DEFINITELY won't work because then log 1 + log r = log r, which is not log (1+r). So, can you use antilogs (anything with log) to solve and show your steps?

Thanks!

2007-07-25 14:59:39 · 3 answers · asked by kremechoco 1

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis.

y = (1/x^5), y = 0, x = 4, x = 5;

about the y-axis.

2007-07-25 14:56:21 · 1 answers · asked by Anonymous