Isolating a variable in an equation

[tanderse]

Homework Statement

given the equation:

(k1)(L^2)sin(theta)cos(theta)+(k2)(L^2)sin(theta)-(k1)(L^2)sin(theta)cos(theta)-.5(m)(g)(L)cos(theta) = 0

find theta in terms of k1,k2,L,m,g

I've been messing around with trig identities all day. I would really appreciate some help.

 

[vela]

At the risk of pointing out the obvious, don't the first and third terms cancel?

 

[tanderse]

my bad, I had 2 typos in the equation. my notes has become such a mess, I can't even keep things straight on this problem anymore. here's the correct version:

(k2)(L^2)sin(theta)cos(theta)+(k1)(L^2)sin(theta)-(k1)(L^2)sin(theta)cos(theta)-.5(m)(g)(L)cos(theta) = 0

find theta in terms of k1,k2,L,m,g