steps: 

1. first compare the second equation x^2+y^2-4x-8y-5=0 with the eq of center of circle x^2+y^2+2gx+2fy+c=0 , compute the center of the circle that is (-g,-f)

hence here the center of circle is (2,4)

2. calculate the radius : Sqrt(g^2+f^2-c)= 5 units

if the line intersects circle at two points

For physics, you should have HC Verma Volumes 1&2, Resnick Halliday Walker ( revised by Amit Gupta). If you have time you can also solve University Physics for the JEE.

Chemistry has three sections- physical, organic and inorganic. For physical chemistry you should solve Physical Chemistry by Narendra Avasthi. For

Hello dear, 

Some of the books that you can refer for JEE entrance exam are: 

• Complete mathematics by ravi prakash, ajay kumar, usha gupta
• Skills in mathematics for JEE main and advance- algerba by Dr. Sk goyal
• M. L. Agrawal entire syllabus IIT-JEE
• math concept maps for IIT JEE MAINS

Hie,

Yes, you can pursue a bachelors degree in mathematics on the fulfilment of eligibility criteria as specified by the college you want to take admission in. But then you need to drop engineering because you can not pursue two regular degree courses at the same time.

All the Best!

You can go for Msc in IT Or Computer Science to get into software engineering roles where you can get good profikes into Data Analytics and Data science since you hav egood knowledge of numbers becaus eof Bsc Mathematics. Studnets can also go for Mtech in CSE via GATE scores. 

Please letusknow for which exam shall you require all questions papers. We can share details and answerkey accordingly  

You can alternatively check our website for all sample papers and asnwer keys for preferred exams you are seeking. 

Hey.

You can get admission through JAM without mathematics in Class 12th too in selected courses. Some courses have a requirement of maths in 12th Class like Chemistry, Mathematics, Economics etc and rest of them dont.

You can use the link below for more details about each course.

https://www.google.co.in/amp/s/university.careers360.com/articles/jam-eligibility-criteria%3famp

Best