Fairrly Quick Math Question?
926741
sin^2(x) = ( 1 - cos(2x))/2\n\nso,\n\ncos(2*2y) = 1 - sin^2(2y)\n\nso we can rewrite sin(2y) = cos(4y) as:\n\n2sin^2(2y) + sin(2y) - 1 = 0\n\nlet u = sin(2y)\n\n2u^2 + u -1 =0\n\nu = 1/2\nor\nu = -1\n\nso,\n\nsin(2y) = 1/2\nor\nsin(2y) = -1\n\n2y = sin^-1(1/2)\nor\n2y = sin^-1(-1)\n\nso\ny = pi/12 = 15 degrees\nor\ny = -pi/4 = -45 degrees\n\nso the answer is y =15 degrees since we want only positive solutions.\n\ncheck:\nsin(2*15) = cos(4*15)\nsin(30) = cos(60)
175955
this in not a fair riddle! lol
191038
hmm.. sounds like a homework question.  tsk tsk..
1019803
thanx for the 2 points
869178
0.  \n\nMost libs aren't even up yet.  They don't work.
63340
Good question, and if you findout how to calculate it, please let me know at iamarghya@yahoo.com\n\nFor the ignorants, please refrain from answering things you do not know.
16382
See Answer 4 on the source page below
958343
you evil Troll! You asked a trick question!\n\n(half of 2) plus 2=3\n            -BUT-\nhalf of (2 plus 2)=2
605811
As Lauren said, it's 1/x.\n\nMemorize this. It will be very useful.
847480
Q = m * Cp * DeltaT.\n\nPlug the numbers in.  Get Cp from your book.
957682
half it then times it by 2! that will give u the answer
1067
ummmm... i cant count that high. let me grab my calculator. i calculate 3 as the answer. ;) lol
614589
width = 5 \nlength = 12
164104
maybe :\n\nKa = 1.3*10^-2
611639
do the math moron!!!!!!
247689
Use analytical trig (hint: sin function).  That should give you the answer you are looking for.
1065939
thanx for 2 points :D