Science & Mathematics - 21 August 2006

I don't quite understand what to do in this question...
1. Use the Pythagorean identity:
Given that cos x = 3/5 and 3pi/2< x < 2pi, find sin x and tan x

2006-08-21 00:56:46 · 7 answers · asked by Anonymous in Mathematics

It is not debatable tht whether spirits exist or not..but how science look at it? In future can we prove their existence?

2006-08-21 00:55:04 · 14 answers · asked by Qurious Lawyer 1 in Other - Science

is it chitin of cellulose..or sth else

2006-08-21 00:51:50 · 4 answers · asked by Anonymous in Biology

2006-08-21 00:51:31 · 14 answers · asked by Joe G 1 in Weather

How does the length of the string or weight of the ball influence the ball?Will it's arc decrease? What else can occur?

2006-08-21 00:48:35 · 14 answers · asked by where's the problem??!! 2 in Physics

how is the pressure on a surface lets say a square centimeter, at a specific altitude and speed calculated?
I plan to launch a rocket to low earth orbit with a spring loaded air inntake that i want to close at a certain altitude.

2006-08-21 00:43:05 · 2 answers · asked by kent_thoresen 2 in Other - Science

2006-08-21 00:39:11 · 10 answers · asked by Tammie C 3 in Botany

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america america america @@@@@@@@@@@@@@@@@

everywhere america @@@@@@@@@@@@@@@@@@@

is this right ??????????? no country in this world is more powerful than UNITED STATES OF AMERICA ????????????

This is wrong and i hope that you will support me

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2006-08-21 00:32:20 · 16 answers · asked by Anonymous in Physics

i will now do olevel i am 16

2006-08-21 00:19:28 · 7 answers · asked by mrbajaj 1 in Astronomy & Space

2006-08-21 00:15:32 · 1 answers · asked by paymanns 2 in Engineering

I'm European and I don't know the American measurement.

2006-08-21 00:10:25 · 13 answers · asked by pope1882 1 in Mathematics

2006-08-21 00:09:52 · 6 answers · asked by bakbiter 3 in Other - Science

2006-08-21 00:07:49 · 17 answers · asked by james g 1 in Mathematics

2006-08-21 00:06:21 · 15 answers · asked by Greg K 1 in Other - Science

2006-08-21 00:05:40 · 7 answers · asked by Greg K 1 in Biology