how to plot tangent line in simulink

hi this is a graph that i get from simulink. may i know how to plot a tangent line in this simulink graph to obatain my time constant? Thank you.

Answer 1

[Shubh Sahu]

Time constant would be 0.37 times of peak amplitude. Please refer to these links for following details

https://www.mathworks.com/matlabcentral/answers/14580-how-to-draw-tangent-line-simulink-graph

https://www.mathworks.com/matlabcentral/answers/426362-how-to-draw-a-tangent-line-on-a-curve