Hello!
Odd functions are functions that are symmetric with respect to the origin.
Even functions are functions that are symmetric with with respect to the y-axis.
Therefore, the graph of y = sin(x) + cos(x) has no symmetry (neither).
Odd functions are functions that are symmetric with respect to the origin.
Even functions are functions that are symmetric with with respect to the y-axis.
Therefore, the graph of y = sin(x) + cos(x) has no symmetry (neither).