Science & Mathematics - 31 October 2007

I know all the formulas for these type of proofs. I just have trouble getting one side to equal the other, and these two are giving me trouble.


1.) sin 3x (over) sin x - cos 3x (over) cos x = 2

2.) (1-sin^2x)(1-tan^2x) = cos2x

Get left to equal right on both ones.

Thanks for the help!

2007-10-31 09:07:49 · 3 answers · asked by neverisenough 1 in Mathematics

determine if x+.5 is a factor of

P(x)=8x^4 - 36x^3 - 38^2 + 81x +45

Use a chart to show your work and then state whether or not x+,5 is a factor

2007-10-31 09:06:09 · 3 answers · asked by K Rose 3 in Mathematics

As I understand it a quantum computer is a machine built under the foundations of Quantum Mechanics that would make the circuits so small that they can be in more than one place at a time (the miracle of minaturization is reaching it's limits on how small a transistor can get).

2007-10-31 09:06:03 · 3 answers · asked by primalclaws1974 6 in Physics

2007-10-31 09:03:49 · 11 answers · asked by Anonymous in Mathematics

This is not Science!
This puerile nonsense is best placed in R&S or mythology!
Any fellow proper scientists out there agree that this sub-category trivializes true science and should be removed from S&M?

2007-10-31 09:03:13 · 7 answers · asked by Anonymous in Other - Alternative

2007-10-31 09:00:45 · 4 answers · asked by srs112982 1 in Biology

i'm confused can someone tell me the difference between fision and fusion...?
i know we have nuclear power...which is fision...???

2007-10-31 09:00:27 · 10 answers · asked by Anonymous in Physics

fill in the blanks.....
blood is a mixture of four main parts. there are two types of cells called _______ cells which carry oxygen and _______ cells . blood also contains ________ which helps it clot . these are carried in a pale _______ liquid called __________ .

2007-10-31 08:59:56 · 5 answers · asked by Anonymous in Biology

why bacterium has 1024 type of protein but only one type of polysacharide?

2007-10-31 08:59:15 · 1 answers · asked by setareh n 1 in Biology

This is not Science!
This purile nonsense is best placed in R&S or mythology!
Any fellow proper scientists out there agree that this sub-category trivializes true science and should be removed from S&M?

2007-10-31 08:58:48 · 6 answers · asked by Anonymous in Other - Alternative

i need this for my project...

2007-10-31 08:57:53 · 1 answers · asked by bree $ 1 in Biology

Four 1.8 kg masses are located at the corners of a square 1.00 m on each side. Find the magnitude and direction of the gravitational force on a fifth 1.8 kg mass placed at the midpoint of the bottom side of the square.

2007-10-31 08:56:09 · 2 answers · asked by matt c 1 in Physics

2007-10-31 08:54:46 · 13 answers · asked by fresh2 4 in Astronomy & Space

2007-10-31 08:52:09 · 15 answers · asked by boardr 1 in Biology

please help me to solve this

2007-10-31 08:52:00 · 2 answers · asked by Anonymous in Mathematics

why do most species living at high latitudes and high altitudes tend to be most generalists while those living the tropics tend to be ecological specialists?

2007-10-31 08:48:49 · 2 answers · asked by TheJoker 3 in Botany

selling frozen yogurt at a fair, you make $565 and use 250 cones a single scoop cost $2 and a double scoop cone cost $2.50 how many of each type of cone did u sell
i need the answer and how you got the answer

2007-10-31 08:45:48 · 4 answers · asked by Anonymous in Mathematics

Why was it up there during the day?

2007-10-31 08:45:15 · 7 answers · asked by Anonymous in Astronomy & Space

Three particales are located in a coordinatet system...
The mass 3kg is located at the origin.
The mass 6kg is located 10 meters on the x coordinate, and the mass 9 kg is located 6 meters on the y coordinate.

Find the distance of the center of gravity from the origin.

2007-10-31 08:43:57 · 1 answers · asked by Anonymous in Physics

i need to know a couple of animals that are herbivores that live in grasslands

2007-10-31 08:43:53 · 3 answers · asked by Laurennn 1 in Biology

A wire 80 cm long is cut into 3 pieces of lengths y, x and 55 − x − y and each piece is bent into squares. Find the absolute maximum and absolute minimum of the areas of these squares.

2007-10-31 08:43:45 · 2 answers · asked by cheri1286 2 in Mathematics

2007-10-31 08:40:40 · 7 answers · asked by Alwaleed 1 in Medicine

This may be hard to understand without the pic, but here goes.

The figure shows an open box with a square base and a partition down the middle. The box is to have a volume of 400 cubic inches. Express the amount of material needed to construct the box ,A, as a function of the length of a side of its square base, x.

The box looks like a shoe box with a partition down the center. The length and width are x, and the height is y.

Help, thanks.

2007-10-31 08:37:07 · 2 answers · asked by Happy Killa Pants 2 in Mathematics

Calculate the pH of the solution that results from the addition of 0.020 moles of HNO3 to a buffer made by combining
0.500 L of 0.290 M NH4Cl ( use Ka = 5.60 x 10 -10 )
and 0.500 L of 0.580 M

I get 9.39 and it's wrong.

2007-10-31 08:36:17 · 1 answers · asked by JC 1 in Chemistry

PTC testing. Why is it common to be a taster than to be a non-taster?

2007-10-31 08:35:49 · 3 answers · asked by Anonymous in Biology

http://news.yahoo.com/photo/ydownload_ap/20071029/photos_net_ap_ts/1193702239;_ylt=Asweye5.3cQ6JrWmN2PRiVUuQE4F

and the story
http://news.yahoo.com/s/ap/20071028/ap_on_fe_st/odd_bigfoot_in_pa

2007-10-31 08:34:15 · 13 answers · asked by Anonymous in Paranormal Phenomena

given then y=1/(2x^2 - 2x +1)^(3/2)

how do you integrate y?

thanks for the help, urgently needed.

2007-10-31 08:33:59 · 2 answers · asked by Anonymous in Mathematics

some snow leopards are becoming extinc

2007-10-31 08:33:39 · 3 answers · asked by Anonymous in Zoology

any one know any good slogans. please some originals not the ones you find in google!

inuendo is always a good option!

civil engineering.

2007-10-31 08:32:23 · 4 answers · asked by Paddy H 1 in Engineering

Explain why most chemical bonds would be classified as either polar or covalent or ionic.

2007-10-31 08:28:36 · 4 answers · asked by Anonymous in Chemistry