Finding the maximum and minimum of trigonometric function in high school mathematics (p90,27) Y = SiNx - radical (3) cosx, X ∈ R; According to the difference angle formula of trigonometric function, 2Sin (x - π / 3) = SiNx - radical (3) cosx can be obtained Yin-1

Finding the maximum and minimum of trigonometric function in high school mathematics (p90,27) Y = SiNx - radical (3) cosx, X ∈ R; According to the difference angle formula of trigonometric function, 2Sin (x - π / 3) = SiNx - radical (3) cosx can be obtained Yin-1

The reason is that SiNx and cosx cannot be separated,
This problem must combine SiNx and cosx
That is, f (x) = SiNx - √ 3cosx
=2(1/2sinx-√3/2cosx)
=2(cos60°sinx-sin60°cosx)
=2sin(x-60°)
By - 1