Little help...
 

Is anyone here bloody dam good at maths? I need some help with rearanging an equation (the Karplus equation)...it has a trigonomical function in it which im having trouble with :(

Matt

Googled Karplus equation and came up with this. :?

J(φ) = A * cos2(φ − 60) − B * cos(φ − 60) + C

What about it? :?

mmm i'm thick so pointless asking me :roll:

Whats the equation and what do u want it rearraging to?

Sounds like you need to PM Prof. He should be pretty good on that sort of thing if its Maths stuff.

I'm fairly certain that, in most cases, 2 + 2 = 4...

... except for all those times when it seems to only make 3. :?

Oh yeah, and that one in a million chances often come up nine times out of ten. :smt102

dont look at me.. Im in the same boat as K.. 2 + 2 = -5 most times with me... :lol: if I want to get 4.. Ive got to cheat! :lol:

I can legitimately get 2 + 2 to equal 10 or 11* though it probably doesnt help... :P :wink: :lol:

* base 4 and base 3

One and one is one.



If you listened to Medicine Head in the 70s

oops showing me age there. :oops:

Law - im using a simplified version:

J = A * cos^2(dihedral angle) - 0.28

I need to find an expression for the dihedral angle term - the cosine function is giving me greif :(

Matt