Formula For Regents Flashcards
1
Q
unit circle
A
Cos0= x/1, x Sin0= y/1, y Tan0= y/x, sin/cos
2
Q
Trig ratios
A
Cos0= x/r Sin0= y/r Tan0= y/x
3
Q
Radians —> degrees
A
(180/pi) * rad.
4
Q
Degrees —> radians
A
(Pi/180) * degrees
5
Q
Trig functions reciprocal
A
Csc0= r/y Sec0= r/x Cot= x/y
6
Q
Trig identities pairs
A
Sec= 1/cos0 Cos= 1/sec0 Csc= 1/sin0 Sin= 1/csc0 Cot= 1/tan0 Tan= 1/cot0 Tan= sin0/cos0 Cot= cos0/sin0
7
Q
Anual
A
A(t)= Aob^t
8
Q
Compound quarterly semi monthly
A
A(t)= Ao(1+r/n)^t
9
Q
Money or population is double trouble Etc
A
A(t)= Ao*b^t/k K= time needed
10
Q
Unit circle equ.
A
X^2+y^2=1^2
11
Q
Unit circle values
A
Cos0 * x
————-
1 * 2
12
Q
Refrende angles
A
2q: 180-x
3q: x-180
4q: 360-x
13
Q
Frequency
A
# of cycles B/2pi
14
Q
Period
A
Length of 1 cycle
2pi/b
2pi= full circle
15
Q
Zscore
A
(Raw value-mean) / SD
