Formula Flashcards
1
Q
Trig formula:
1=
A
Sin²A+Cos²Α
2
Q
Trig formula:
Sin2A=
A
2SinACosA
3
Q
Trig formula:
Cos2A=
A
Cos²Α-Sin²Α
4
Q
Trig formula
Tan2A=
A
2TanA
————
1-Tan²A
5
Q
Trig formula:
Tan(A+B)=
A
TanA+TanB
—————-
1-TanATanB
6
Q
Trig formula:
Tan(A-B)=
A
TanA-TanB
—————
1+TanATanB
7
Q
Sequences:
Nth term of Arithmatic sequence
A
Un=a+(n-1)d
8
Q
Sequences:
Sum of Arithmatic formula
A
Sn=n/2(2a+(n-1)d)
9
Q
Sequences:
Nth term of Geometric
A
a(r)⁰⁰¹
10
Q
Sequences:
Sum of Geometric
A
a(1-r¹)
———
1-r
11
Q
Sequences:
Sum to infinity of geometric
A
a
—-
1-r
12
Q
Small angle:
CosA
A
1- A²
—
2
13
Q
Radians:
Area of sector
A
1/2 r² A
14
Q
Radians:
Length of an arc
A
rA
15
Q
Radians:
Area of a segment
A
1/2 r² (A-sinA)
