I need to find the integral region $\mathcal R$ which covers area CPRQ portion of the circle radius $t$.
The integration looks as
$$I=\int\int_{\mathcal R}f(r,\theta)dr d\theta$$
Can someone help me to write these polar coordinate integration limits for $r$ and $\theta$?
If necessary, he angle $RCQ$ is $\beta$ where $Tan\, \beta=\frac{d}{h}$.
The angle $ROQ$ is $\alpha$ where $\cos\,\alpha = \frac{h \left(\sqrt{d^2+h^2} \sqrt{t^2-\frac{d^2 h^2}{d^2+h^2}}+d^2\right)}{t \left(d^2+h^2\right)}$