Background Concepts Flashcards
1
Q
cos(-a)
A
cos(a)
2
Q
sin(-a) =
A
-sin(a)
3
Q
cos(x+-π/2) =
A
-sin(x)
4
Q
cos(x-π/2) =
A
sin(x)
5
Q
sin(a+π/2) =
A
cos(a)
6
Q
sin(a-π/2) =
A
-cos(a)
7
Q
cos(a+-π) =
A
-cos(a)
8
Q
sin(a+-π) =
A
-sin(a)
9
Q
sin(a+-b) =
A
sin(a)cos(b)+-cos(a)sin(b)
10
Q
cos(a+-b) =
A
cos(a)cos(b) -+ sin(a)sin(b)
11
Q
Acos(a) + Bsin(a) =
A
(A2 +B2)(1/2) cos(a-arctan(b/a)
12
Q
cos(a)cos(b)
A
.5[cos(a-b) + cos(a+b)]
13
Q
sin(a)sin(b)
A
.5[cos(a-b) - cos(a+b)]
14
Q
sin(a)cos(b)
A
.5[sin(a-b) + sin(a+b)]
15
Q
A
