Chemistry
Senior High
全てわからないです！
教えてください🙏
291.0°≧0≦180°で,次の条件を満たす角0 は
(口 (1) cos > 0
□ (3) sin Acos0>0
□ (2)
□ (4) *
,鋭角、鈍角のどちらであるか。
* tan0<0
sin Acos0<0
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