Hi Sheikh,

There are many easy chapters in Class 12th Mathematics, but if you ask for the easiest it is Vector Algebra.

Other easy chapters are Three Dimensional Geometry, Linear Programming, Probability.

Refer here for more info - https://school.careers360.com/articles/cbse-class-12-maths-syllabus

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!