三角関数の加法定理、証明できますか？（２）

New channel Hidenori Ogata: title sample judged 'whole' (A dedicated math/physics lecture series by a numerical analysis researcher, covering analytical mechanics, differential ); passed a second screen for sellers/exam-prep/re-uploads; 0 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.

A 5-minute video from Hidenori Ogata: “三角関数の加法定理、証明できますか？（２）”.

Video by Hidenori Ogata, played through YouTube's embedded player.