Bonsoir,
Euh niveau collège ??
[tex]sin(x)=cos(14)\\
sin(\pi-x)=cos(14)\\\\
x=arcsin(cos(14))\\
\pi-x=arcsin(cos(14))\\\\
x=arsin(cos(14))+2k\pi\\
\pi-x=arcsin(cos(14))+2k\pi\\\\
x=-arcsin(cos14))+\pi-2k\pi\\
x=-arcsin(cos(14))+\pi+2k\pi\\\\
\boxed{x \left \{ {{arsin(cos14))+2k\pi} \atop {-arcsin(cos14))+\pi+2k\pi}} \right.}
[/tex]
