Mathematics
Senior High
ช่วยสอนทำหน่อยค่ะ
14. sin (60°+ A) cos (30²-A) + co₂ (60°+A) sin(50²-A) =
15
- cos (Xx - A) CO₂ (2X + A) - Sin (X - A) sin (1 •A) =
3
3
3
3
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