Hi,
Why does cos(pi/2 -x) = sin(x)?
When plotting points, I see that it is true, but I get a different graph using transformations.
I reflect the graph over the y axis (the graph looks identical to the original), and I move the grapth to the left since pi/2 is positive.
Also, if the graph of cos(x) = cos(-x), why doesn't cos(pi/2+x),which equals sin(x), = cos(-(pi/2)-x)?
Thanks
Why does cos(pi/2 -x) = sin(x)?
When plotting points, I see that it is true, but I get a different graph using transformations.
I reflect the graph over the y axis (the graph looks identical to the original), and I move the grapth to the left since pi/2 is positive.
Also, if the graph of cos(x) = cos(-x), why doesn't cos(pi/2+x),which equals sin(x), = cos(-(pi/2)-x)?
Thanks