How do you simplify the expression using a double angle formula ##1-2sin^2(2x)##?
February 20th, 2023
Remember that ##cos2theta=1-2sin^2theta##.
Hence
##1-2sin^2(2x)=cos4x##
Remember that ##cos2theta=1-2sin^2theta##.
Hence
##1-2sin^2(2x)=cos4x##