# Lecture 1 Part 1 Integrals Class 12 Maths

## Part - 1 Lecture - 1 Chapter 7 Integrals

भीड़ हमेशा उस रास्ते पर चलती है जो रास्ता आसान लगता है,
लेकिन इसका मतलब यह नहीं की भीड़ हमेशा सही रास्ते पर चलती है|
अपने रास्ते खुद चुनिए क्योंकि आपको आपसे बेहतर और कोई नहीं जानता|

Booklets/Notes/Assignments are typed here on this website and their PDFs will be made available soon.

Logics for this lecture:

Question must be in addition/subtraction form.

Try to convert division/multiplication between functions to addition/subtraction by simplification.

If there are functions other than algebraic functions like trigonometry and logarithmic function, then you can use their respective identities to simplify them.

Logics for this lecture:

Question must be in addition/subtraction form.

Try to convert division/multiplication between functions to addition/subtraction by simplification.

If there are functions other than algebraic functions like trigonometry and logarithmic function, then you can use their respective identities to simplify them.

Questions Discussed in this lecture:
1. $$\int x^{2} \left(1-\frac{1}{x^{2} } \right), dx =\frac{x^{3} }{3} -x+C$$

2. $$\int _{}^{}\left(\sqrt{x} -\frac{1}{\sqrt{x} } \right) ^{2} dx=\frac{x^{2} }{2} +\log |x|-2x+C$$

3. $$\int \left(8^{x} +x^{8} +\frac{8}{x} +\frac{x}{8} \right), dx =\frac{8^{x} }{\log 8} +\frac{x^{9} }{9} +8\log |x|+\frac{x^{2} }{16} +C$$

4. $$\int (e^{a\log x} +e^{x\log a} ), dx =\frac{x^{a+1} }{a+1} +\frac{a^{x} }{\log a} +C$$

5. $$\int \left(\frac{\cos 2x+2\sin ^{2} x}{\cos ^{2} x} \right) , dx=\tan x+C$$

6. $$\int (x^{c} +c^{x} ), dx =\frac{x^{c+1} }{c+1} +\frac{c^{x} }{\log c} +C$$

7. $$\int _{}^{}\frac{x^{2} +3x+4}{\sqrt{x} } , dx=\frac{2}{5} x^{\frac{5}{2} } +2x^{\frac{3}{2} } +8\sqrt{x} +C$$

8. $$\int \left(\frac{2a}{\sqrt{x} } -\frac{b}{x^{2} } +3c, , \sqrt[{3}]{x^{2} } \right) , dx=4a\sqrt{x} +\frac{b}{x} +\frac{9cx^{\frac{5}{3} } }{5} +C$$

9. $$\int _{}^{}\frac{x^{3} -x^{2} +x-1}{x-1} , , dx =\frac{x^{3} }{3} +x+C$$

10. $$\int _{}^{}\frac{sec ^{2} x}{{\rm \cosec}^{2} x} , dx=\tan x-x+C$$

11. $$\int \sqrt{1+\sin 2x} , dx=-\cos x+\sin x+C$$