13.已知图是函数y=2sin(ωx+Φ) ((|Φ|)
问题描述:
13.已知图是函数y=2sin(ωx+Φ) ((|Φ|)
答
13、无图14、sin440=sin80.√(1-sin^2 440°)=√(1-sin^2 80°)=cos80°15、最小正周期为π的偶函数16、cos(α-π/6)+sinα=cos(a-π/6)+cos(π/2-a)=2cos(π/6)cos(a-π/3)=√3*cos(a-π/3)=√3*sin(π/2-a+...