ADD Maths Equations Flashcards
1
Q
Equation of a circle.
A
(x-a)^2 , (x-a)^2 = r^2
2
Q
Trig identities Tan
A
Tan x = Sin x
———-
Cos x
3
Q
Trig identities Cos/Sin
A
Sin2x + Cos2x = 1
4
Q
P(A given B)
A
P(A given B) = P(AnB)
————-
P(B)
5
Q
P(A or B)
A
P(A or B) = P(A) + P(B) - P(AnB)
6
Q
P(A and B)
A
P(A and B) = P(A) x P(B)
7
Q
Purmutations
A
nPr = n!
——-
(n-r)!
8
Q
Combinations
A
nCr = n!
———-
r! (n-r)!
9
Q
P(r success)
A
P(r success) = nCr p^r q^n-r
10
Q
Log xy
A
Log xy = log x + log y
11
Q
Log (x/y)
A
Log (x/y) = Log x - Log y
12
Q
Log x^n
A
Log x^n = n log x
13
Q
Log Rules:
__
Log n_/x
A
Log Rules:
__
Log n_/x = log x ^1/n = 1/n log x
14
Q
Loga1
A
Loga1 = 0
15
Q
Log a A
A
Log a A = 1
