 # Maths Formulas For Class 10

The Maths formulas for class 10 are the general formulas which are not only crucial for class 10 but also form the base for higher-level maths concepts. The maths formulas are also important in various higher education fields like engineering, medical, commerce, finance, computer science, hardware etc. Even in almost every industry, the most common formulas introduced in class 10 are used.

The class 10 maths formulas include formulas related to real numbers, polynomials, quadratic equations, triangles, circles, statistics, probability, etc. These maths formulas will be extremely helpful for students to be able to solve questions more accurately and quickly.

## List of Maths Formulas for Class 10 (Chapterwise)

The basic maths class 10 formulas are almost the same for all the boards. The list of maths formulas are:

### Linear Equations

 One Variable ax+b=0 a≠0 and a&b are real numbers Two variable ax+by+c = 0 a≠0 & b≠0 and a,b & c are real numbers Three Variable ax+by+cz+d=0 a≠0 , b≠0, c≠0 and a,b,c,d are real numbers

### Pair of Linear Equations in two variables:

 a1x+b1+c1=0 a2x+b2+c2=0

Where

• a1, b1, c1, a2, b2, and c2 are all real numbers and
• a12+b12 ≠ 0 & a22 + b22 ≠ 0

It should be noted that linear equations in two variables can also be represented in graphical form.

### Algebra or Algebraic Equations

The standard form of Quadratic Equations:

 ax2+bx+c=0 where a ≠ 0 And x = [-b ± √(b2 – 4ac)]/2a

### Algebraic formulas:

• (a+b)2 = a2 + b2 + 2ab
• (a-b)2 = a2 + b2 – 2ab
• (a+b) (a-b) = a2 – b2
• (x + a)(x + b) = x2 + (a + b)x + ab
• (x + a)(x – b) = x2 + (a – b)x – ab
• (x – a)(x + b) = x2 + (b – a)x – ab
• (x – a)(x – b) = x2 – (a + b)x + ab
• (a + b)3 = a3 + b3 + 3ab(a + b)
• (a – b)3 = a3 – b3 – 3ab(a – b)
• (x + y + z)2 = x2 + y2 + z2 + 2xy + 2yz + 2xz
• (x + y – z)2 = x2 + y2 + z2 + 2xy – 2yz – 2xz
• (x – y + z)2 = x2 + y2 + z2 – 2xy – 2yz + 2xz
• (x – y – z)2 = x2 + y2 + z2 – 2xy + 2yz – 2xz
• x3 + y3 + z3 – 3xyz = (x + y + z)(x2 + y2 + z2 – xy – yz -xz)
• x2 + y2 =½ [(x + y)2 + (x – y)2]
• (x + a) (x + b) (x + c) = x3 + (a + b +c)x2 + (ab + bc + ca)x + abc
• x3 + y3= (x + y) (x2 – xy + y2)
• x3 – y3 = (x – y) (x2 + xy + y2)
• x2 + y2 + z2 -xy – yz – zx = ½ [(x-y)2 + (y-z)2 + (z-x)2]

### Basic formulas for powers

• pm x pn = pm+n
• {pm}⁄{pn} = pm-n
• (pm)n = pmn
• p-m = 1/pm
• p1 = p
• P0 = 1

### Arithmetic Progression(AP) Formulas

If a1, a2, a3, a4, a5, a6, are the terms of AP and d is the common difference between each term, then we can write the sequence as; a, a+d, a+2d, a+3d, a+4d, a+5d,….,nth term… where a is the first term. Now, nth term for arithmetic progression is given as;

 nth term = a + (n-1) d

Sum of nth term in Arithmetic Progression;

 Sn = n/2 [a + (n-1) d]

### Trigonometry Formulas For Class 10

Trigonometry maths formulas for Class 10 covers three major functions Sine, Cosine and Tangent for a right-angle triangle. Also, in trigonometry, the functions sec, cosec and cot formulas can be derived with the help of sin, cos and tan formulas.

Let a right-angled triangle ABC is right-angled at point B and have $\angle \theta$.

Sin θ= $\frac{Side\, opposite\, to\, angle\, \theta}{Hypotenuse}$=$\frac{Perpendicular}{Hypotenuse}$ = P/H

Cos θ = $\frac{Adjacent\, side\, to\, angle\, \theta}{Hypotenuse}$ = $\frac{Adjacent side}{Hypotenuse}$ = B/H

Tan θ = $\frac{Side\, opposite\, to\, angle\, \theta}{Adjacent\, side\, to\, angle\, \theta}$ = P/B

Sec θ = $\frac{1}{cos\, \theta }$

Cot θ = $\frac{1}{tan\, \theta }$

Cosec θ = $\frac{1}{sin\, \theta }$

Tan θ = $\frac{Sin\, \theta }{Cos\, \theta }$

Trigonometry Table:

 Angle 0° 30° 45° 60° 90° Sinθ 0 1/2 1/√2 √3/2 1 Cosθ 1 √3/2 1/√2 ½ 0 Tanθ 0 1/√3 1 √3 Undefined Cotθ Undefined √3 1 √3/2 0 Secθ 1 2/√3 √2 2 Undefined Cosecθ Undefined 2 √2 2/√3 1

Other Trigonometric formulas:

• sin(90° – θ) = cos θ
• cos(90° – θ) = sin θ
• tan(90° – θ) = cot θ
• cot(90° – θ) = tan θ
• sec(90° – θ) = cosecθ
• cosec(90° – θ) = secθ
• sin2θ + cos2 θ = 1
• sec2 θ = 1 + tan2θ for 0° ≤ θ < 90°
• Cosec2 θ = 1 + cot2 θ for 0° ≤ θ ≤ 90°

Get complete Trigonometry Formulas list here

### Circles Formulas For Class 10

• Circumference of the circle = 2 π r
• Area of the circle = π r2
• Area of the sector of angle θ = (θ/360) × π r2
• Length of an arc of a sector of angle θ = (θ/360) × 2 π r

(r = radius of the circle)

### Surface Area and Volumes Formulas For Class 10

The common formulas from the surface area and volumes chapter in 10th class include the following:

• Sphere Formulas
 Diameter of sphere 2r Circumference of Sphere 2 π r Surface area of sphere 4 π r2 Volume of Cylinder 4/3 π r2
• Cylinder Formulas
 Circumference of Cylinder 2 πrh Curved surface area of Cylinder 2 πr2 Total surface area of Cylinder Circumference of Cylinder + Curved surface area of Cylinder = 2 πrh + 2 πr2 Volume of Cylinder π r2 h
• Cone Formulas
 Slant height of cone l = √(r2 + h2) Curved surface area of cone πrl Total surface area of cone πr (l + r) Volume of cone ⅓ π r2 h
• Cuboid Formulas
 Perimeter of cuboid 4(l + b +h) Length of the longest diagonal of a cuboid √(l2 + b2 + h2) Total surface area of cuboid 2(l×b + b×h + l×h) Volume of Cuboid l × b × h

Here, l = length, b = breadth and h = height In case of Cube, put l = b = h = a, as cube all its sides of equal length, to find the surface area and volumes.

### Statistics Formulas for Class 10

In class 10, the chapter statistics mostly deals with finding the mean median and standard deviation of grouped data.

(I) The mean of the grouped data can be found by 3 methods.

1. Direct Method: x̅ = $\frac{\sum_{i=1}^{n}f_i x_i}{\sum_{i=1}^{n}f_i}$, where fi xi is the sum of observations from value i = 1 to n And fi is the number of observations from value i = 1 to n

2. Assumed mean method : = $a+\frac{\sum_{i=1}^{n}f_i d_i}{\sum_{i=1}^{n}f_i}$
3. Step deviation method : x̅ = $a+\frac{\sum_{i=1}^{n}f_i u_i}{\sum_{i=1}^{n}f_i}\times h$

(II) The mode of grouped data:

Mode = $l+\frac{f_1 – f_0}{2f_1 – f_0 – f_2} \times h$

(III) The median for a grouped data:

Median = $l+\frac{\frac{n}{2} – cf}{f} \times h$

Check out more important class 10 maths resources from below: