Can someone help me determine how to find expressions for the Areas A and B (with respect to theta)?
I understand how to find the area of triangle POR but I'm having trouble see how to find the area of A.
Im presuming that this is from a segment of a circle
$\displaystyle \therefore OR = OP$
So then use the equation for Area of a triangle and divide it by two to get an expression for B in terms of $\displaystyle \theta$
As for A i cant remember my C2 too well, but im sure you use the formula along the lines of $\displaystyle \theta \cdot r^2 \cdot \frac{1}{2}$