1. The problem statement, all variables and given/known data If theta increases at a constant rate of 3 radians per minute, at what rate is x increasing in units per measure at the instant when x equals 3 units? 3. The attempt at a solution I drew the triangle and I came to the conclusion that I needed to use 5sin(theta)=x Then I did the derivative and it comes out to 5cos(theta)d(theta)/dt=dx/dt Here is where I am a little confused, I get cos(theta) = (5/2)√(3)/5 based off of the 30 60 90 triangle. Am I doing this right? After I do the calculations, I don't get the right answer because no where are you supposed to have a sqrt in the answer.