trig main Flashcards
1
Q
sin(a+b)
A
sin(a)cos(b) + cos(a)sin(b)
2
Q
sin(a-b)
A
sin(a)cos(b) - cos(a)sin(b)
3
Q
cos(a+b)
A
cos(a)cos(b) - sin(a)sin(b)
4
Q
cos(a-b)
A
cos(a)cos(b) + sin(a)sin(b)
5
Q
sin2a
A
2sin(a)cos(a)
6
Q
cos2a
A
cos^2(a)-sin^2(a)
7
Q
sin(a)/cos(a)
A
tg(a)
8
Q
cos(a)/sin(a)
A
ctg(a)
9
Q
sin^2(a)+cos^2(a)
A
1
10
Q
tg(a)*ctg(a)
A
1
11
Q
sin(-a)
A
-sin(a)
12
Q
cos(-a)
A
cos(a)
