dumb sen Flashcards
1
Q
sen(a+b)
A
SENaCOSb + COSaSENb
2
Q
cos(a+b)
A
cosacosb - senasenb
3
Q
tag(a+b)
A
{tg(a)+tg(b)]/[1-tg(a)tg(b)}
4
Q
sen(a-b)
A
senaCOSb - cosaSENb
5
Q
cos(a-b)
A
cosacosb + senasenb
6
Q
tg(a-b)
A
[tga-tgb]/[1+tgatgb
7
Q
sen(2a)
A
2senacosa
8
Q
cos(2a)
A
cos^2(a) - sen^2(a)
9
Q
tag(2a)
A
2tga/(1-tg^2a)
10
Q
sen(a/2)
A
±√ [(1−cos(a))/2]
11
Q
cos(a/2(
A
±√[(1+cosa)/2]
12
Q
tg(a/2)
A
±√[(a-cosa)/(1+cosa)]
13
Q
sena + senb
A
2sen(a+b/2)cos(a-b/2)
14
Q
sena - senb
A
2sen(a-b/2)cos(a+b/2)
15
Q
cosa + cosb
A
2cos(a+b/2)cos(a-b/2)
