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f(x)=sinxcosx-√3sinx方+2分之√3
=(1/2)*sin2x- (√3/2)*(2*sinx方-1+1)
=(1/2)*sin2x- (√3/2)*(-cos2x+1)
=(1/2)*sin2x+(√3/2)*(cos2x)-√3/核蔽游2
=sin(2x+π/改销3)-√3/2
T=2π/2=π 周期
-1<=sin(2x+π/3)<=1 所以当sin(2x+π/3)=-1时,
即2x+π/3=3π/2 +2kπ
x=7π/12+kπ (k属于Z)
所求函数有最小值:-1-√3/2
希望你能看懂,你能明白并宏, 望采纳,赞同
=(1/2)*sin2x- (√3/2)*(2*sinx方-1+1)
=(1/2)*sin2x- (√3/2)*(-cos2x+1)
=(1/2)*sin2x+(√3/2)*(cos2x)-√3/核蔽游2
=sin(2x+π/改销3)-√3/2
T=2π/2=π 周期
-1<=sin(2x+π/3)<=1 所以当sin(2x+π/3)=-1时,
即2x+π/3=3π/2 +2kπ
x=7π/12+kπ (k属于Z)
所求函数有最小值:-1-√3/2
希望你能看懂,你能明白并宏, 望采纳,赞同
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