Science & Mathematics - 25 October 2007

2007-10-25 04:46:08 · 8 answers · asked by radical... 1 in Astronomy & Space

I have tried to answer this trig identity question and I am completely stuck. (I would ask my teacher, but it's half term hols this week)
cot2x + cosec2x ≡ cotx
please start with:
LHS=cot2x +cosec2x
and work it from there until it gets to the stage of
=cotx
=RHS

(cotx = 1/tanx, cosecx = 1/sinx, secx = 1/cosx)
Thanks
If you use other identities (double angle formula etc.) please say which
THANK YOU =]

2007-10-25 04:45:58 · 6 answers · asked by pazuzu_futurama 2 in Mathematics

i need to get it off the internet if possible if its free

2007-10-25 04:45:17 · 1 answers · asked by Anonymous in Earth Sciences & Geology

1. x^2 - 10x - 24 = 0

2. 4x^2 = 11x + 3

simplify the expression

3. -5x^0

thank you thank you!

2007-10-25 04:44:43 · 3 answers · asked by Nana Callie loves to sing 4 in Mathematics

2007-10-25 04:42:21 · 17 answers · asked by Anonymous in Engineering

2007-10-25 04:39:02 · 8 answers · asked by Katherine N 1 in Mathematics

can anyone think up of factors for this number, 108 ?

2007-10-25 04:38:57 · 9 answers · asked by Anonymous in Mathematics

They showed on Star Trek one night, fire, which looked like red/yellow molecules floating, bouncing into each other. Is fire a specific molecule?

2007-10-25 04:31:49 · 5 answers · asked by Anonymous in Chemistry

2007-10-25 04:31:27 · 6 answers · asked by Katherine N 1 in Mathematics

The Combined Perimeter of an equilateral triangle and a square is 10. Find the dimensions of a the triangle and square that produce a minimum total area.

2007-10-25 04:28:46 · 2 answers · asked by Jason 3 in Mathematics

Is it ok if I park a 40 ton truck on your foot ?

2007-10-25 04:26:34 · 5 answers · asked by John S2005 3 in Physics

2007-10-25 04:26:20 · 3 answers · asked by Katherine N 1 in Mathematics

I'm conducting an experiment involving research about the scientific composition of rose petals.

2007-10-25 04:26:00 · 1 answers · asked by Hillary R 1 in Botany

plz tell me answer of this question....fast as possible...!

2007-10-25 04:25:43 · 2 answers · asked by shiraz 1 in Mathematics

2007-10-25 04:25:43 · 1 answers · asked by Paul S 1 in Astronomy & Space

what is x?
4^(x+2)=log[3](4^6)

The answer i got was x=0.460 but i dont think is correct.
Thanks in advance for your help!!!!

2007-10-25 04:24:18 · 2 answers · asked by Anonymous in Mathematics

2007-10-25 04:22:18 · 2 answers · asked by superdruft186 1 in Physics

2007-10-25 04:22:07 · 11 answers · asked by LONITA F 1 in Weather

If i launch 3 bottle rockets of varying weight, will the one with the most weight have a longer travel time? OR will the one with the least weight have more travel time?

2007-10-25 04:21:11 · 5 answers · asked by Heather 3 in Physics

could someone please help me do this as i dont really have a clue of how to do it! thanks
charlie

2007-10-25 04:20:56 · 7 answers · asked by chinkles 1 in Mathematics

2007-10-25 04:18:11 · 1 answers · asked by Anonymous in Biology

2007-10-25 04:15:48 · 5 answers · asked by Scott L 1 in Earth Sciences & Geology

I had a practical on mass spectral fragmentation patterns of some organic compounds and had a table to fill in to show the m/z, formula of ion and fragmentation diagram. I have done that but there is also a calculation to be done but i dont know how to do it. As the teachers are also unavailable and i have to hand this in tomorow i am unable to find out how to do it.
So please anyone who may know or has done this practical before please help and i will very much appreciate it.
when i did this practical i got on the graph for CH2Cl2 there were a total of 13 peaks.
i am only told to calculate the intensity ratio for three peaks.
Thank you
Regards

2007-10-25 04:15:18 · 1 answers · asked by Anonymous in Chemistry

its an aeroplane

2007-10-25 04:14:41 · 8 answers · asked by billyrodger37 1 in Geography

2007-10-25 04:12:52 · 15 answers · asked by Anonymous in Earth Sciences & Geology

I'm doing biomedical science at degree level. and we have to writeup the practicals carried out. Can anyone give me details and criteria of what a excellent written report will include.. Thanku..xx

2007-10-25 04:08:58 · 2 answers · asked by Anonymous in Biology

What are the proposed ideas?
If we can land 2 rovers on mars that have been there for years or land a man on the moon, why can't we find out if we can do this? just in case we have to.

2007-10-25 04:08:10 · 4 answers · asked by Jansen J 4 in Astronomy & Space

here is a problem with solution
http://docs.google.com/Doc?id=dc83hzcs_222d455g8

i have some doubts

can you please clarify ?

2007-10-25 04:04:51 · 2 answers · asked by calculus 1 in Mathematics

2007-10-25 04:04:01 · 2 answers · asked by Jocelyn W 1 in Chemistry

2007-10-25 04:03:17 · 2 answers · asked by kleenexpocketpack 1 in Physics