misc math! Flashcards
1
Q
in how many ways can 6 books be arranged on a shelf?
A
6 x 5 x4 x 3 x 2 x1
2
Q
A locker password consists of 4 different digits from 0 to 9. How many different passwords can be made if order matters?
A
10 x 9 x 8 x 7
2
Q
A racing event has 15 competitors. How many different ways can the top 4 finishers be arranged in order?
A
15!/(15−4)!
3
Q
distance formula
A
√(x2−x1)^2+(y2−y1)^2
4
Q
midpoint formula
A
(x1 + x2)/2, (y1 + y2)/2
5
Q
csc reciprocal identity
A
1/sin
6
Q
sec reciprocal identity
A
1/cos
7
Q
cot reciprocal identity
A
1/tan
8
Q
tan quotient identity
A
sin/cos
9
Q
how to get the limitation
A
substituting. if it isnt rational then factor
10
Q
how to get the derivative
A
multiply the coefficient with the exponent of the variable, and then subtract 1 from the exponent.
