Maths definitions Flashcards
1
Q
Define extrapolation
A
Making predictions outside the original data
range.
2
Q
Explain the dangers of extrapolation.
A
It is unreliable as the trend may not continue.
3
Q
Define geometric sequence
A
Multiplies or divides between terms
4
Q
How to tell wether a sequence converges or not
A
If r < 1 it converges
If r > 1 it does not converge
5
Q
Define domain of a function
A
all of the values that x can take
6
Q
Define range of a function
A
all of the values that y can take in a function of x
7
Q
Sin2A =
A
2sinAcosA
8
Q
Cos2A =
A
cos^2A-sin^2A
2cos^2A-1
1-2sin^2A
9
Q
tan2A =
A
2tanA/1-tan^2A
10
Q
asinx +_ bcosx
A
Rsin(x+_alpha)
11
Q
acosx +_ bsinx
A
Rcos(_+alpha)
12
Q
Rcos(alpha) =
A
a
13
Q
Rsin(alpha) =
A
b
14
Q
R =
A
root(a^2 + b^2)
15
Q
sin^2 + cos^2 =
A
1
