Sat Math Formulas

Question 1

Complimentary rule

Answer 1

Sin(x)=cos(90-x)
Cos(x)=sin(90-x)

Question 2

Total angle of a shape

Answer 2

180(n-2)
n= number of sides

Question 3

Arc length

Answer 3

2pi(r) * angle/360

Question 4

Sector área

Answer 4

Pir^2 * angle/360

Question 5

Circle equation

Answer 5

(X-x value of center of circle)^2(Y-y value of center of circle)^2 = r^2

Question 6

Sum of solutions for quadratic equation

Answer 6

-(b/a)

Question 7

X coordinate of vertex of quadratic function

Answer 7

H=-(b/2a)

Question 8

Vertex form of quadratic equation

Answer 8

Y=a(x-h)^2+k

Question 9

Square of sum

Answer 9

a^2+2ab+b2=(a+b)^2

Question 10

Square of difference

Answer 10

a^2-2ab+b^2=(a-b)^2

Question 11

Difference of squares

Answer 11

a^2-b^2=(a+b)(a-b)