由f(x)=2sin(2x+π/6)
=2sin[2(x+π/12)]
振幅A=2,
周期T=2π/2=π,
初项φ=-π/12
①2x+π/6=π/2时,
x=π/6时,f(π/6)max=2.
2x+π/6=3π/2时,
x=3π/2时,f(3π/2)min=-2.
②弧度麻烦,我用角度.
-180°----105°,-60°---30°,120°---180°增加,其余减少.
③自己画草图.
由f(x)=2sin(2x+π/6)
=2sin[2(x+π/12)]
振幅A=2,
周期T=2π/2=π,
初项φ=-π/12
①2x+π/6=π/2时,
x=π/6时,f(π/6)max=2.
2x+π/6=3π/2时,
x=3π/2时,f(3π/2)min=-2.
②弧度麻烦,我用角度.
-180°----105°,-60°---30°,120°---180°增加,其余减少.
③自己画草图.