Initial Amplitude and the Release Point

[moo5003]

Question:

"A pendulum with a length of 2.82m is released from an initial angle of 17.5 degrees. After 1100s, its amplitude has been reduced by friction to 5.30 degrees. What is the value of b/2m?"

Word Done:

A = A(initial)e^(-betaT)

Basically I have done the problem on the basis that A(initial) is equal to 17.5 degrees. I just wanted to make sure that the initial amplitude is actually the release point? Or is there a way to find it.

For anyone that would like to check my answer was:

Beta = 3.28x10^-4

 

[Integral]

As long as the initial velocity is 0, the release point is the initial amplitude.

 

[moo5003]

As long as the initial velocity is 0, the release point is the initial amplitude.

Thank you for your quick response ^_^, that means I should have the right answer as is.