If you want to go for the course of Architecture, then you have to appear for the JEE MAINS paper 2. Now the JEE MAINS paper-2 isn't actually the same as that of the JEE MAINS paper-1 for Engineering.

The JEE MAINS paper-2 is divided in three sections. The part-1 consist of Mathematics, Part-2 consist of General Aptitude and the part-3 consist of Drawing. So as you can see only the Mathematics section matches with the paper-1.

The syllabus of Mathematics is provided below for JEE MAINS paper-2:

• Complex numbers and quadratic equations

• Matrices and determinants

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• Sets, relations and functions

• Mathematical induction

• Permutations and combinations

• Mathematical reasoning

• Limit, continuity and differentiability

• Integral calculus

• Three-dimensional geometry

• Differential equations

• Binomial theorem and its simple applications

• Sequences and series

• Vector algebra

• Statistics and probability

• Trigonometry

• Coordinate geometry

So if you wish to go for the JEE MAINS paper-2 then it would be better for you to prepare for it separately.

For more information regarding the JEE MAINS paper-2 consider the link below:

https://engineering.careers360.com/articles/jee-main-paper-2-syllabus

I hope this helps. Wish you a great day!