And we're assuming that this blue graph is showing the derivative, the slope of the tangent line for any x value of the red graph. And we've gotten an intuition for that in previous videos. Now what I'm gonna do next is I'm gonna shift both of these graphs to the left by pi over two. Shift it to the left by pi over two. And I'm also gonna shift the blue graph to the left by pi over two. And so what am I going to get? Well, the blue graph is gonna look like this one right over here.