x ( t ) = A ∗ c o s ( b ∗ t + c ) {\displaystyle x(t)=A*cos(b*t+c)} where A {\displaystyle A} - amplitude b = 2 π T {\displaystyle b={\frac {2\pi }{T}}} ; T {\displaystyle T} - period c {\displaystyle c} - phase
cosine - is an even function x ( t ) = x ( − t ) {\displaystyle x(t)=x(-t)} sine - is an odd function x ( t ) = − x ( − t ) {\displaystyle x(t)=-x(-t)}
sine function possible to flip horizontally and then flip vertically, as result -same function and plot
