Kulla_9289
Junior Member
- Joined
- Apr 18, 2022
- Messages
- 217
I got [imath]a^2\left(\pi -2ϕ\cos ^2\left(2ϕ\right)\right)[/imath]. By the way, the real question is, how did you know that solving the small triangle using trigonometry would give us the y value? How could you see that?