Using sliders on Desmos it is possible to display tangent lines at a movable point on a function's graph. But if the tangent line is vertical, i.e. slope is undefined, the tangent line is not displayed at that point. Is there a way to have Desmos automatically display the vertical tangent line?
Doug C. answered • 04/25/25
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desmos.com/calculator/aar3tmuww2
Doug C.
Whoops. I did not share my entire screen during the screen share, so Desmos did not appear in the video. Visit the graph to see what was being discussed.04/25/25
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Doug C.
This graph uses the function y = sin(x), which does not have a vertical tangent line, but shows that when slope equals zero the horizontal tangent line is displayed: desmos.com/calculator/xdenbeuvgd04/25/25