Question 1040796
y=sin (x+pi/4).  Here, sin (bx+c), the phase shift is -c/b or -pi/4, which is 45 degrees.
The parent graph is y=sin x
{{{graph(300,200,-6,6,-1,1,sin(x))}}}
{{{graph(300,200,-6,6,-1,1,sin(x+(pi/4)))}}}
The second graph shows the sin starting from -45 degrees or just under 1 radian (abscissa is radian scale)
One way to look at it is to see what it takes to make the sine 0, and here it would be to start at -pi/4 for x, for then the sin will be of 0, and that is 0.