- #1
kLPantera
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Homework Statement
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?
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.