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Algebra 2 Formulas Regents
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Gravity
Terms in this set (44)
average rate of change
Negative Exponents
Radical to fractional exponent
Imaginary roots
do not touch x axis
Conjugates
x-1 and x+1
Powers of i
i=i
i^2= -1
i^3= -i
i^4= 1
half life formula
exponential regression
compounded continuously
Compounded Interest Formula (more than once a year)
Percent Change Formula
1 standard deviation
68%
2 standard deviations
95%
3 standard deviations
99.7%
astc
All Students Take Calculus
tan
sin/cos
Pythagorean Identities
reference angles
the acute angle formed by the terminal side and the horizontal axis ( distance to the x axis)
reciprocal of cos
secant (sec)
reciprocal of sin
csc (cosecant)
reciprocal of tan
cotangent (cot)
Trig graphs
ex: -5cos(3x-7)+2
amp: 5
freq: 3
period: 2pi/3
Max:7
Min: -3
Horizontal shift: left 7
Midline: y=2
Unit Circle
radical equations
1) isolate radical
2) square root both sides
3) solve
4) check
log rules
log to exponent
even function
symmetric with respect to the y-axis
odd function
symmetrical through origin (R of 180)
recursive formula
explicit formula
arithmetic sequence
geometric sequence
sigma notation
a way to write an arithmetic series using the summation sign and the summand
P(AUB)
P(A) + P(B) - P(AnB)
P(A|B)
P(A and B)/P(B)
independence test
Events are independent if P(A|B) = P(A) or P(AnB) = P(A) x P(B)
mutually exclusive
Events that cannot occur at the same time.
Remainder Theorem
interval notation
directrix and focus formula
(x-h)^2 = 4p(y-k) for up and down
4p(x-h) = (y-k)^2 for side to side
domain
range
y values
radians to degrees
180/pi
degrees to radians
π/180
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