Mathematics - 10 December 2007

1. Rewrite the square root of cos^2 + sin ^2 +cot^2 in a nonradical form without using absoulte values for pi
2. Points on the terminal sides of angles play an important part in the design of arms for robots. Suppose a robot has a straight arm 18 in. long that can rotate about the origin in a coordinate plane. If the robot's hand is located at (18,0) and then rotates through an angle of 60 degrees, what is the new location of the hand....??? this one is really confusing me..

I tried these a few times already and need some help. It would be greatly appreciated :)

2007-12-10 11:51:40 · 1 answers · asked by Anonymous

The short side of an isosceles triangle is 16cm long. Increasing each side length by 24cm doubles the perimeter. how long are the other sides of the original triangle? explain your reasoning.

2007-12-10 11:49:06 · 2 answers · asked by hudson p 1

x/x+2 + 4/x-2

2007-12-10 11:47:19 · 7 answers · asked by Anonymous

Solve for the value of x.
PLEASE SHOW THE STEPS!!

4x^(2/3) - 5 = 20

2007-12-10 11:46:43 · 1 answers · asked by Anonymous

A large rectangular room is 12.34m long. what increase in width will make the perimeter 5m longer if the length stays the same?

2007-12-10 11:45:45 · 6 answers · asked by hudson p 1

I need help with these problems:

1. An airplane is at an elevation of 35,000 ft when it begins its approach to an airport. Its angle of descent is 6 degrees.
(a) what is the distance between the airport and the point on the ground directly below the airplane?
(b) What is the approximate air distance between the plane and the airport?

2007-12-10 11:43:34 · 2 answers · asked by Mia16 3

Lim as x-->0 of (1-10x)^(1/x). Please show each step.

2007-12-10 11:43:31 · 1 answers · asked by IE 3

i can only use these numbers

2007-12-10 11:35:03 · 4 answers · asked by no name 1

i think that it is x=100^-.37t but would like to know if my work is right plz

2007-12-10 11:31:25 · 2 answers · asked by jaja_juice 1

2007-12-10 11:24:54 · 3 answers · asked by deb0708 1

Under which operation is the set of positive real numbers not closed?
(1) addition
(2) subtraction
(3) multiplication
(4) division

2007-12-10 11:24:15 · 4 answers · asked by ☮ 5

please dont solve it for me!! (its not for hw but if i get it right 15 bounus points will be added to my grade and bring it froma c+ to a b+...wich is MUCH BETTER:D..but getting that much bounus points with out working would just not be nice)
just tell me how to solve it if you can

a^2=b^2+c^2-2bc(cos A) solve for b

***^2 means squared
***you will have to use the quatdratic formula
***you will use square roots

if anyone helps me with this you are my hero!!

2007-12-10 11:19:40 · 6 answers · asked by mydadisageek 2

Let f be the function defined by f(x) = (sinx)^2-sinx for 0
(a) find the x-intercepts of the graph of f
(b) find the intervals on which f is increasing
(c) find the absolute maximum value and the absolute minimum value of f.

2007-12-10 11:04:33 · 1 answers · asked by Diana 1

IN SOCCER, DANIEL SCORED 6 GOALS IN HIS LAST 10 ATTEMPT.

WHAT IS THE PROBABILITY OF DANIEL SCORING A GOAL ON HIS NEXT ATTEMPT?

SUPPOSE DANIEL ATTEMPTS TO SCORE 50 GOALS. HOW MANY GOALS WILL HE MAKE?

2007-12-10 11:00:31 · 7 answers · asked by leah 1

1000=3000/(20+a)

Please explain each step, because I already know the answer. I just don't understand how to GET the answer. Please try to give me an explanation that I can apply to other math problems of the sort.

2007-12-10 10:53:31 · 9 answers · asked by Anonymous

A)(5,2) B)(-2,-3) C)(0,5) D)(4,5)
explain answer

2007-12-10 10:39:35 · 1 answers · asked by Anonymous

is. A)x=y^2 B)y=logx^2 C)y=-x^2 D)x=-y^2
explain answer

2007-12-10 10:37:05 · 1 answers · asked by Anonymous

Solve each system by subsitution. Check your answer.

1. y=x-2
y=4x+1

2. y=x-4
y=-x+2

3. y=3x+1
y=5x-3

2007-12-10 10:36:13 · 19 answers · asked by Anonymous

√36 n^2
√6*4 n^2
√6*2^2 (n^2)
6.2 (n^2)
=2n^2 √6

2007-12-10 10:30:39 · 4 answers · asked by Trisha 2

Y'know like the division rule for 9 is adding up the digits in the number and seeing if 9 goes into them. THANKS!

2007-12-10 10:29:22 · 7 answers · asked by shnish 4

i no tha the radius of the cone is 9. how and what is the total surface area of the cone? geometry

2007-12-10 10:26:14 · 3 answers · asked by Anonymous

An amoeba reprduces by doubling every 20 minutes. If an amoeba is placed in a specimen dish at 12:00 noon, how many amoebas will be in the dish at 5:00 P.M.?

Please show the work or steps you did to solve the problem

2007-12-10 10:22:00 · 7 answers · asked by ? 2

hi i need some explanation to this problem
1. Find the tangent line approximation to f(x) x^2/3 at x=8

2. use your answers to number 1 to obtain a linear approximation estimating the value of (7.98)^2/3

3 will this be an overestimate or an underestimate

2007-12-10 10:14:43 · 1 answers · asked by Anonymous

2007-12-10 10:08:09 · 25 answers · asked by Ronnie S 1

Let R be a commutative ring with a unity. Suppose that I and J are two prime ideals of this ring, i.e. R/I and R/J are integral domains. Assume that I+J is not the whole ring R. Is it then true that I+J is prime as well? If not, can you find a counterexample?

2007-12-10 10:06:59 · 3 answers · asked by partalopoulo 2

2007-12-10 10:02:33 · 9 answers · asked by Trisha 2

2007-12-10 09:51:06 · 4 answers · asked by Dee 1

2007-12-10 09:48:01 · 12 answers · asked by Anonymous

write the binomial expansion of the expression

(a-b)^6

2007-12-10 09:28:12 · 4 answers · asked by Anonymous

im not sure on all of them so please correct me if i am wrong

http://smg.photobucket.com/albums/v700/XoXCoNnIeEe/?action=view¤t=037-1.jpg
http://smg.photobucket.com/albums/v700/XoXCoNnIeEe/?action=view¤t=036-1.jpg

2007-12-10 09:27:53 · 1 answers · asked by Anonymous