March 18, 2024: Studying Maths (42), Trigonometry-3, 数学の勉強（42）、三角関数-3）

I have just finished the third round of trigonometry in maths. I enjoyed it as much as I did in the second round. The next round is the last part of this section.

　三角関数の３回目を終えました。 2回目と同じくらい楽しめました。次回はこのセクションの最終回です。