# CBSE Class 11-Mathematics: Mathematics Revision Sheet for Class 11 and Class 12 Physics (For CBSE, ICSE, IAS, NET, NRA 2022)

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Trigonometry Properties of trigonometric functions

**1. Pythagorean identity**

**2. Periodic function**

**3. Even-Odd Identities**

**4. Quotient identities**

**5. Co-function identities**

**6. Sum difference formulas**

**7. Double angle formulas**

8. Product to sum formulas

**9. Power reducing formulas**

**10. Reciprocal identities**

**Binomial Theorem**

From the binomial formula, if we let and , we can also obtain the binomial series which is valid for any real number n if .

**Geometric Series**

where q is not equal to 0, q is the common ratio and a is a scale factor. Formula for the sum of the first n numbers of geometric progression

Infinite geometric series where then , when n goes to infinity So the sum S of such infinite geometric progression is:

which is valid only for|x|

Arithmetic Progression The sum S of the first n values of a finite sequence is given by the formula:

Quadratic Formula then