Mathematics
Senior High
Solved
高二數學-三角函數
sin(ẞ-y) sin(y-a)
+
+
cos y cosẞ
cos a cosy
(12. 設有向角a, B, y的餘弦值均不為0,試求一
sin(a-ẞ)
cos a cos ẞ
Cost-Sina-B)+ Cosa Sio (B-d) + Corß sing-a)
Cos & Cosß Cost
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