Mathematics - 16 September 2007

i am having a problem....i'm having a right angles triangle in which i know all the three angles and the base....how can i find the hypotenuse? i have heard that that this is possible thorugh the law of sines...how? what is this law? and what are sines?can someone please guide me?

2007-09-16 23:52:01 · 9 answers · asked by suhas m 2

If I' am given a dependent value and am asked to find it's corresponding independent value, how could I go about doing this (assuming I am given other ordered pairs as well)?

2007-09-16 23:51:55 · 1 answers · asked by Anonymous

The attractive force (F) between two objects varies directly as the product of their masses (M1 and M2) and inversely as the square of their distance (d) . If M1 and M2 are both halved and d is doubled , find the ratio of the new value of F to its original value .

2007-09-16 23:49:44 · 1 answers · asked by Anonymous

2007-09-16 23:09:23 · 26 answers · asked by ishita 1

2007-09-16 23:06:45 · 4 answers · asked by 121><._}/? 1

How do u work out the exact angles of these trigonometry questions? They are in my test 2mrw and i dnt know how to do it. Here are some practice questions i received from my teacher:
Find exact values of:
a) tan 60 degrees
b) cos (pi)/4
c) sin -45 degrees

and how do u solve these equations:

0 a) cos theta= -0.5
b)sin theta= -0.5

please show working out.

2007-09-16 22:57:28 · 7 answers · asked by Inhaler 4

A triangle has sides of length x inches, x + 1 inches, and x + 2 inches and its perimeter is given by x + (x + 1) + (x + 2) = 42 inches.

2007-09-16 22:43:59 · 8 answers · asked by Vonnie 2

1, List the prime number between 15 and 45?

2,What is the L.C.M of 4, 5 and 8?

3, What is the H.C.F of 24, 36 and 40?

2007-09-16 22:43:39 · 8 answers · asked by Ben 1

L^(-1){1 / (s^(2) + s - 20)}

Thanks!

2007-09-16 22:15:10 · 1 answers · asked by Anonymous

Please help!!! All the problem says is: solve.

2007-09-16 22:14:37 · 10 answers · asked by Vonnie 2

i am trying to use U-substitution.
but both of the following work:
u=tanx du=sec^2x
u=secx du=secxtanx

so i would have 2 different answers after pluging U back in....
which is correct?

thanks for answering

2007-09-16 21:48:46 · 4 answers · asked by thankyouforhelp 1

2007-09-16 21:46:39 · 2 answers · asked by sandy 1

Transform the equation in the Quadratic Equation form and solve the equation for the indicated variable.

For "r"

1/r+ 2/1-r=4/r^2

2007-09-16 21:06:57 · 5 answers · asked by alexo 4

A farmer wishes to enclose a rectangular region bordering a river using 600 feet of fencing. He wants to divide the region into two equal parts using some of the fence material. What is the maximum area that can be enclosed with the fencing?

2007-09-16 20:35:23 · 2 answers · asked by russelle 2

x-9 + x+2 = 7
___ ___ __
6----- 5-------- 6

It looks wierd i wasnt sure how to set it up but these are all fractions. The underscore is the fraction line. its x-9 OVER 6 plus x+2 OVER 5 equals 7 OVER 6

Please show me how to do this problem!! I keep getting x=2 wich seems ok but it is wrong according to the books!!

2007-09-16 20:19:08 · 4 answers · asked by Anonymous

A) 10
B) 1
C) -2
D) 2

2007-09-16 20:09:22 · 7 answers · asked by Anonymous

A coach has to pick 11 seniors to play football. If he can make his decision 12376 ways, how many seniors are eligible to play football?

2007-09-16 20:07:22 · 3 answers · asked by Nick 2

Can you think of a game involving a geometric manipulative?

2007-09-16 19:46:11 · 4 answers · asked by Chase L 1

y = x [sec (3 - 8x)]
Find dy/dx.
I would greatly appreciate if someone could help me figure this out, and point me to a good site that has an in-depth explanation of all of the possible cases involving the chain rule. After all, getting the answer to this question without knowing how it was arrived at will not help me understand the subject material...

2007-09-16 19:35:34 · 7 answers · asked by quicksilv3rflash 3

x-3/7 + x+9/3 = 9/7

find x

I am so lost

2007-09-16 19:27:07 · 5 answers · asked by Anonymous

u=1
u^2+2u
which is 3 but it turned out to be wrong can you help me out?


http://i181.photobucket.com/albums/x85/ctti_3/Untitled-60.jpg

2007-09-16 19:24:59 · 2 answers · asked by sdt3 1

2007-09-16 19:23:31 · 17 answers · asked by chinfongong 2

Solve 1 - (x-3)/3 is less than or equal to 1/2

These interval notation problems are usually easy for. I guess I don't know what to do with the (x-3)/3.

I know the final answer is x is greater than or equal to 9/2 or [9/2 , infinity )

2007-09-16 19:19:16 · 4 answers · asked by john_ 2

2007-09-16 19:13:41 · 2 answers · asked by Anonymous

Solve x^2 + 7x - 7 = 0

Find the x-intercepts of f(x) = x^2 +7x - 7

2007-09-16 19:09:14 · 1 answers · asked by Anonymous

2007-09-16 19:02:37 · 6 answers · asked by Anonymous

which ordered pairs (4,1), (9,0), (-1,-2), (-16,5) are the solution for equation x + 5y = 9?

2007-09-16 19:00:00 · 6 answers · asked by hplover1430 2

|x + 1| = 4
|y - 1| = 7

2007-09-16 18:56:32 · 3 answers · asked by SICK MY DUCK! 1

i know the answer is 67/40 but i dont know how to get it please help

2007-09-16 18:44:06 · 9 answers · asked by kiana817 1

Explain the difference between congruent and similar figures ?

2007-09-16 18:38:08 · 7 answers · asked by Anonymous