How to draw a tangent using a point and an angle?
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Neha Sinha
am 2 Mär. 2019
Kommentiert: Star Strider
am 4 Mär. 2019
I need to draw a tangent from (0,0) with an angle of 89.8412 as shown in the curve. How to do that?
![img.PNG](https://www.mathworks.com/matlabcentral/answers/uploaded_files/206534/img.png)
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Star Strider
am 2 Mär. 2019
Try this:
ad = 89.8412; % Angle (Degrees)
tangline = 200*[0 cosd(ad); 0 sind(ad)];
figure
plot(tangline(1,:), tangline(2,:))
grid
axis([0 2 0 300])
It produces two vectors in the ‘tangline’ matrix, the first row being the x-coordinates and the second row the y-coordinates. It then plots them.
You can check that these are correct with:
Check = atan2d(diff(tangline(2,:)), diff(tangline(1,:)))
It returns the ‘ad’ value.
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