Question Number 58928 by mr W last updated on 01/May/19
Commented by mr W last updated on 01/May/19
$${Find}\:{area}\:{of}\:{red}. \\ $$
Commented by MJS last updated on 01/May/19
$$\mathrm{calculating}\:\mathrm{the}\:\mathrm{intersections}\:\mathrm{and}\:\mathrm{integrals} \\ $$$$\mathrm{I}\:\mathrm{get}\:\mathrm{25}\left(\pi−\mathrm{1}−\frac{\mathrm{1}}{\mathrm{2}}\mathrm{arcsin}\:\frac{\mathrm{4}}{\mathrm{5}}\:−\mathrm{2arcsin}\:\frac{\mathrm{3}}{\mathrm{5}}\right)\approx\mathrm{9}.\mathrm{77357} \\ $$