✨ Best Answer ✨
・sinθ(180°－θ)＝sinθ
・cos(180°－θ)＝－cosθ
⑵
＝sinθ×(－cosθ)＋sinθ×cosθ
＝－sinθcosθ＋sinθcosθ
＝0
Answers
Were you able to resolve your confusion?
Users viewing this question
are also looking at these questions 😉
Recommended
詳説【数学Ⅰ】第一章 数と式～整式・実数・不等式～
4462
117
詳説【数学Ａ】第２章 確率
3587
26
詳説【数学Ⅰ】第二章 ２次関数（前半）～関数とグラフ～
3180
15
詳説【数学Ａ】第１章 個数の処理（集合・場合の数・順列組合）
3025
46
ありがとうございます