xin loi a vip em ko co y tai vi em ko biet thank o cho nao thui, xin a chi cho em di?

3cosx-4sinx+2/3cosx-4sinx-6=3.....giai dum em di anh

Update:

n em cam on anh vp bang cach nao day???

Update 3:

sin(pi/2+2x)+canbac3√sin(pi-2x)=1

Update 5:

em co 1 cau hoi thac mac ko biet anh bao nhieu tuoi rui, ma kinh nghiem toan hoc cua a vp cao the , a co the chi em vai cach hoc toan duoc chu'.hihi.neu dc thank a vp_two

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