Math Formula for Class 12

Most of the class 12 students do not perform confidently in their Mathematics exams because of their inability to analyze the problems or use appropriate formulas to solve the problem. In several circumstances, this inefficient performance of the students is due to their phobia towards the 12 math formula. With constant efforts and continued practice using Maths formula for class 12 pdf available on several educational websites, students can gain excellent scores in their board examinations of Class 12 Maths. Strong hold over Class 12 Maths formulas will remove negativity from the students’ mind and induce a positive attitude of performing better.  

List of Class 12 Formula in Vectors and 3-Dimensional Geometry:

Formula	Usage	Description
	To find the position vector	Where r is the position vector
	To calculate the direction ratios
	Vector Addition	PQ and QR are the vectors to be added PR is the resultant addition vector
a + b = b + a (a + b) + c = a + (b + c)	Vector Addition	a, b and c  are the vectors indicating Commutative and Associative law of vector addition
	Vector joining two points	OP1 is the position vector of point P1 and OP2 is the position vector of point P2.
	Skew Lines
	Equation of line

There are some important formulas and identities in vector Mathematics. 

• A vector of unit magnitude is called a unit vector. The most common unit vectors used in Class 12 are i, j and k given by i = [0 0 1], j = [0 1 0] and k = [0 0 1].

• If l = cos a, m = cos b and n = cos c, then a, b and c are called the directional angles of the vector ‘a’ and cos2a + cos2b + cos2c = 1.

• Vector addition obeys commutative and associative law. 

• A zero vector is the additive identity of a vector.

• The negative of a vector is the additive inverse of a vector.

Trigonometry is a branch of mathematics that deals with the study of sides and angles of a three-sided closed geometrical shape (triangle). Trigonometry in class 12 has a wide list of formulas. A few important formulas of class 12 trigonometry are quoted below. 

• x = sin θ is also equivalent to θ = sin-1 x

• x = cos θ is also equivalent to θ = cos-1 x  

• x = tan θ is also equivalent to θ = tan-1 x

Inverse Trigonometric Properties:

• sin (sin-1 p) = p

• cos (cos-1 p) = p

• tan (tan-1 p) = p

• sin-1 (sin A) = A

• cos-1 (cos A) = A

• tan-1 (tan A) = A

Half Angle and Double Angle Trigonometric Formulae:

Tips to Memorize Class 12 Formula:

Mathematics is one of the most difficult subjects for the student community. Many students have a false notion that the subject is more tough because of the formulas and identities in it. More than 70% of the student community finds it difficult to practice and memorize class 12 formulas because of the ambiguity and dilemma of choosing a suitable identity. Students who wonder ‘how to memorize class 12 maths formulas?’ should practice the following tips to memorize the class 12 formula.

Tip 1: Concentration

For the first time, when a new identity is studied, analyze each and every variable used in the formula with utmost concentration. This helps in retaining the formula for a longer duration in our brains.

Tip 2: Relax Mind and Brain

Do not learn or memorize the formulas with a stressed mindset. This will retard the will power of the brain and in turn, will result in forgetfulness and confusion between the variables used in Class 12 formula. 

Tip 3: Use 3 r’s

When a 12th math formula or any other formula, in general, is to be remembered for a long duration, the secret of 3 r’s should be followed. The 3 r’s that help in storing a formula in human memory unit for a lengthier time duration are:

• Revise: Learn the formula for a certain number of times visualizing it.

• Repeat: Repeat the formulas in written form by applying it in the mathematical problems. 

• Recall: Without looking into the formula, stir up the brain to recollect the formula and variables used in it. 

Tip 4: Periodic Revision

Following the tips 1, 2, and 3 may help an individual remember the formula for a short time duration. However, if the class 12 maths formulas are to be remembered for the longest time period, the practice of tip 3 should be repeated on a regular basis. Repeat the tip 3 in a sequence of 1, 3, 5 7 15, 30, 90 days. 

Important 12th maths formulas list pdf can be accessed from various websites that provide study materials and other resources for exam preparation. 

Fun Quiz:

• What is the inverse sine function of the sine of an angle ‘T’ equal to?

1. Cosine of angle T

2. Inverse tangent of angle T

3. Angle T

• Which of the following indicates the representation of unit vector ‘j’?

1. [ 0 0 1 ]

2. [ 0 1 0 ]

3. [ 1 0 1 ]