Dear student,
You can get the syllabus for both class 11 and class 12 on the official website of nta. You would see a pdf of the syllabus which you can download. The link of the official website is :https://jeemain.nta.nic.in/WebInfo/Handler/FileHandler.ashx?i=File&ii=13&iii=Y
You could visit the following link for the official syllabus of jee mains 2021.
Also you can see the syllabus from the following link:
https://engineering-careers360-com.cdn.ampproject.org/v/s/engineering.careers360.com/articles/jee-main-syllabus/amp?amp_gsa=1&amp_js_v=a6&usqp=mq331AQHKAFQArABIA%3D%3D#amp_tf=From%20%251%24s&aoh=16067339992767&referrer=https%3A%2F%2Fwww.google.com&ampshare=https%3A%2F%2Fengineering.careers360.com%2Farticles%2Fjee-main-syllabus

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