A cos(x) + B sin(x)= C sin(x+δ)有複數解：try(2)

B[sub]complex[/sub] > A[sub]complex[/sub]時，E為極小值點[br]B[sub]complex[/sub] < A[sub]complex[/sub]時，E為極大值點
– WC

Información: A cos(x) + B sin(x)= C sin(x+δ)有複數解：try(2)