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Summary Important Math formulae
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Maths is important in this developing world. Easy way to learn maths is through formulae. Some of the important formulae for school students is mentioned in this document.
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Some important math formulae:1. Quadratic formula: x = (-b ± √(b^2 – 4ac)) / 2a
2. Pythagorean theorem: a^2 + b^2 = c^2, where c is the length of the hypotenuse of a right
triangle, and a and b are the lengths of the other two sides.
3. Distance formula: d = √((x2 – x1)^2 + (y2 – y1)^2), where (x1, y1) and (x2, y2) are the coordinates
of two points in a two-dimensional space, and d is the distance between them.
4. Exponential function: f(x) = a^x, where a is a constant and x is the variable.
5. Logarithmic function: loga(x) = y if and only if a^y = x, where a is a constant, x is the value being
evaluated, and y is the exponent.
6. Trigonometric functions: sin(x), cos(x), and tan(x) are functions that relate the angles of a right
triangle to the ratios of its sides.
7. Sum of an arithmetic sequence: Sn = n/2 (a1 + an), where n is the number of terms, a1 is the
first term, and an is the nth term.
8. Sum of a geometric sequence: Sn = a(1 – r^n) / (1 – r), where n is the number of terms, a is the
first term, and r is the common ratio.
9. Law of sines: (a/sin(A)) = (b/sin(B)) = (c/sin(C)), where a, b, and c are the lengths of the sides of a
triangle, and A, B, and C are the measures of its angles.
10. Law of cosines: c^2 = a^2 + b^2 – 2ab cos(c), where a, b, and c are the lengths of the sides of a
triangle, and C is the measure of the angle opposite side c.
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