rotate a Vector2 unity code example

Example 1: unity rotate vector

Vector3 rotated = Quaternion.AngleAxis(-45, Vector3.up) * vector;

Example 2: rotate vector3 around pivot point unity

public Vector3 RotatePointAroundPivot(Vector3 point, Vector3 pivot, Vector3 angles) {    return Quaternion.Euler(angles) * (point - pivot) + pivot;  }

Example 3: unity rotate vector3

Quaternion rotation = Quaternion.Euler(x,y,z);
Vector3 myVector = Vector3.one;
Vector3 rotateVector = rotation * myVector;