The resistance value is x, and its calculation formula is expressed below. If you use a computer to calculate x=1000*tan(pi/4+01)=15.45, so i=5/15.45=0.3236A, but this result is completely different from the picture , I don't know where the error in the simulation is now.

 

It's a little gotcha that's easy to forget about in using angles.
Your computer is using Degrees but Spice uses Radians for the angle.
Which are you intending?

Since you are using Pi as part of the angle value, I expect it's Radians.
If so, to get degrees for the computer calculation, multiply the Radian angle by 180/Pi.

 

(pi/4+01) !?

 

(pi/4+01) !?

Believe it should be 0.1.

 

This is an attempt to draw attention to a mistake. That it needed 0.1 was perfectly clear to me.

 

It's a little gotcha that's easy to forget about in using angles.
Your computer is using Degrees but Spice uses Radians for the angle.
Which are you intending?

Since you are using Pi as part of the angle value, I expect it's Radians.
If so, to get degrees for the computer calculation, multiply the Radian angle by 180/Pi.

Ok, I got it. Thank you so much!

 

This is an attempt to draw attention to a mistake. That it needed 0.1 was perfectly clear to me.

Thank you very much, very useful reminder.