sat math need to know

area of circle

πr²

circumfrance of circle

2πr

equation of a circle

(x-h)²+(y-k)²=r²

area of sector on circle (degrees)

angle/360degrees * r²

area of sector of circle (radians

1/2r²*angle

find arc length (circle - degrees)

angle/360degrees * 2πr

arc legth (circle - radians)

(angle)r

unit circle sin and cos

cos=x

sin=y

degrees to radians

π/180 *degrees

radians to degrees

180/π * radian

midpoint formula

distance formula

regressions - linear

y₁~mx₁+b

regressions - quatratic

y₁~ax₁²+bx₁²+c

regressions - expodential

y₁~a*b^x₁

dsicriminant - what it means

how many solutions there are

1+ = 2 solutions

0 = 1 solution

-1 = no solution

surface area - cylinder

2πr + 2πrh

surface area - cone

πr²+2πrh

surface area - sphere

4πr²

quadratic form - sum of solutions

-b/a

sum = addition

quadratic form - product of solutions

c/a

product = multipication