Mr. Kosik's Mathtime · 2020. 5. 11. · = 4 sin x 16 sin 8x = 8 sinxcosx cos 2xcos 4x COS ....
6
Mr. Kosik's Mathtime · 2020. 5. 11. · = 4 sin x 16 sin 8x = 8 sinxcosx cos 2xcos 4x COS . sin (x + y) + sin (x — y) = 2sinxcosy 17 = tan (2m — x) SON tanx+tan z— x) cot x