Science & Mathematics - 15 July 2007

tan(45 + x) = 2tan (45-x)

can anyone show me the working to this question. the answer is

tan^2 x - 6tanX+1 =0

2007-07-15 19:34:33 · 2 answers · asked by adsion l 1 in Mathematics

2007-07-15 19:32:26 · 5 answers · asked by swathi s 1 in Medicine

2007-07-15 19:29:43 · 1 answers · asked by john ruffy t 1 in Chemistry

2007-07-15 19:24:55 · 5 answers · asked by sri s 1 in Weather

Evaluate -I -40 I
40 is that right?

2007-07-15 19:23:31 · 6 answers · asked by Yep it's me 2 in Mathematics

graph using the intercept method: x + 3y=6

2007-07-15 19:23:01 · 3 answers · asked by jovanni k 1 in Mathematics

there are two specific callendars that end on this date, and they knew about the black hole and alinement of the astrology befor we did.are you ready for the big push,or do you think that its fake? the science is accuratly right....

2007-07-15 19:20:16 · 7 answers · asked by belladonnasmoon 4 in Earth Sciences & Geology

Ten moles of Hydrogen gas at 0°C are forced into a steel cylinder with a volume of 200 mL. What is the pressure of the gas, in atmosphere, inside the cylinder?

Please help me solving this problem step by step...thanks

2007-07-15 19:16:12 · 2 answers · asked by David N 1 in Chemistry

I am aware that sunglasses with blue and purple tints are supposedly harmful to eyes because they are energetically in the higher end of the visible light spectrum and some scientific reports say that they do not prevent, and might even cause cataracts in the eye. Does powder pink count as lower valued shade of purple or is it a variation of red (way down there near the infrared end of the spectrum)?

2007-07-15 19:04:24 · 2 answers · asked by bibimbapbambina 3 in Physics

tell me, is this tyipical
http://www.youtube.com/watch?v=esbS_vT25GU

2007-07-15 19:03:37 · 8 answers · asked by sledge 2 in Geography

2007-07-15 19:01:55 · 2 answers · asked by Anonymous in Weather

7:00 & at what time will small and big hand of the clock will meet.? when it will become a right angle? &when it will form a 180 degrees.

2007-07-15 19:01:09 · 8 answers · asked by kent 2 in Mathematics

I was doing my homework, and on problem 45 in Early Trancend. Calc 5th edition. I got stuck.

I'm supposed to integrate (1-(tanx)^2)/(secx)^2

I tried out some different things(changing it to cos and sin, multipling top and bottom with secs and tans) but none of them worked. The answer in the back of the book says (1/2)sin(2x) + C. I don't understand how to start. Any help?

2007-07-15 18:59:08 · 2 answers · asked by questionMan 1 in Mathematics

2007-07-15 18:53:40 · 8 answers · asked by Anonymous in Biology

Astrophysicists say that the Andromeda Galaxy is raveling toward us at 200,000 miles per hour or about 55.55 miles per second. If Andromeda is 2.5 million light years away how many years will it take for it to impact with our Milky Way Galaxy?

2007-07-15 18:48:43 · 8 answers · asked by Romeo 7 in Astronomy & Space

A hot air balloon is ascending straight up at a constant speed of 7.0 m/s. When the balloon is 12.0 m above the ground, a gun fires a pellet straight up from ground level with an initial speed of 30.0 m/s. Along the paths of the balloon and the pellet, there are two places where each of them has the same altitude at the same time. How far above ground level are these places?

Could you please put an explanation as well? I've been working on this for so long, but I am just no good at physics. Thank you.

2007-07-15 18:46:13 · 3 answers · asked by kathryn 2 in Physics

2007-07-15 18:45:26 · 5 answers · asked by Christy R 1 in Mathematics

Is there anything unique about how panda bears mate. My friend a interesting statement, saying they don't mate like normal males?

2007-07-15 18:41:57 · 10 answers · asked by Nandi Wijay 1 in Zoology

i tried for like 2 hours cant get it!!
A tank can be filled in 6 hours using two pipes. The larger pipe alone would fill it 5 hours sooner than the smaller pipe alone. how long would each pipe alone take?
thnx alot

2007-07-15 18:32:11 · 5 answers · asked by Anonymous in Mathematics

If it does wouldnt it need a large amount of force to propell it? If you had enough light could you push an object?

2007-07-15 18:30:54 · 7 answers · asked by Anonymous in Physics

2007-07-15 18:30:04 · 7 answers · asked by Anonymous in Chemistry

x^2 - 2x >= -1

2007-07-15 18:22:02 · 4 answers · asked by Anonymous in Mathematics

there WAS what i thought a spider in my room and then someone killed it but i wanted to see what kind it was..


all i know about it was that ..

1. the body was little
2. it had really long (what looked like) legs
3. it went up and down the wall really fast moving to the left like as if it wanted to walk over each inch of the wall
4. it looks like it was hovering cause of how it moved.


pleasepleaseplease tell me what it was! a picture or somethin!

2007-07-15 18:21:15 · 8 answers · asked by Anonymous in Zoology

2007-07-15 18:14:02 · 3 answers · asked by usman 1 in Mathematics

2007-07-15 18:12:48 · 5 answers · asked by mohamed_shukoor2000 2 in Astronomy & Space

wat i am really wondering is if UV light can pass through plastic wrap so that wastever is on the other side of the plastic will be effected by the UV

2007-07-15 18:12:11 · 3 answers · asked by tanman 1 in Physics

2007-07-15 18:00:16 · 4 answers · asked by JAMES 4 in Physics

2007-07-15 17:57:30 · 2 answers · asked by Anonymous in Weather

we live in the milky way...outside of that are more stars, etc...WHEN DOES IT END!?!?! it is driving me insane..i know it doesnt end...but it drives me crazy to think that something goes on for eternity..THERES NO WAY!!

2007-07-15 17:57:06 · 14 answers · asked by Tiffy 2 in Astronomy & Space

A. 104v
B. 110v
C. 116v
D. 120v

A single #10 copper wire with type THW insulation thats used in free air with an ambient temp. of 158 F has an ampacity of.

A. 16.5a
B. 31.9a
C. 36.9a
D. 40.0a


Five #8 aluminum conductors with THHN insulation are to be routed through a conduit found in a boiler room with an ambient temp. of 75C. The ampacity of each conductor is.

A. 14.8a
B. 17.0a
C. 36.6a
D. 48.0a

2007-07-15 17:56:04 · 1 answers · asked by d.o.g 1 in Engineering