Chapter 10: Mathematics Flashcards
1
Q
square root of two (estimate)
A
1.4
2
Q
square root of 3 (estimate)
A
1.7
3
Q
11^2
A
121
4
Q
12^2
A
144
5
Q
13^2
A
169
6
Q
14^2
A
196
7
Q
15^2
A
225
8
Q
16^2
A
256
9
Q
20^2
A
400
10
Q
A
= 0
11
Q
A
1
12
Q
log (A x B) =
A
log (A) + log (B)
13
Q
log (A/B) =
A
log (A) - log (B)
14
Q
A
15
Q
log (1/A) =
A
–log(A)
16
Q
Euler’s number (e) estimate
A
2.7
17
Q
convert between natural logs (base e) and common logs (base 10)
A
log x ~ lnx / 2.3
18
Q
approximate log (n x 10^m)
A
~ m + 0.n
example: log (9.2 x 10^8) ~ 8 + 0.92 = 8.92
19
Q
pi circle values
A
(cos, sin)
20
Q
sin θ =
A
opposite / hypotenuse
21
Q
cos θ =
A
adjacent / hypotenuse
22
Q
tan θ =
A
opposite / adjacent
38
Q
A
39
Q
A
40
Q
A
41
Q
A
42
Q
A
43
Q
A
44
Q
A
45
Q
A
