I am trying to calculate the voltage output amplitude of the integrator. I understand that integrating a square-wave creates a triangle, and integrating a triangle creates a sine-wave, and a sinewave creates a cosine-wave. I understand corner frequency is calculated using 1/(2pi(R2)(C)). But I am having a really hard time figuring out the amplitude of the output.

The attached plot shows the input and output waveforms at approximately the -3dB point with is approximately 1kHz.

Any direction is greatly appreciated,

Daniel