Trigonometrie Flashcards
(33 cards)
1
Q
sin 30
A
1/2
2
Q
sin 0
A
0
3
Q
sin 45
A
rad2/2
4
Q
sin 60
A
rad3/2
5
Q
sin 90
A
1
6
Q
cos 0
A
1
7
Q
cos 30
A
rad3/2
8
Q
cos 45
A
rad2/2
9
Q
cos 60
A
1/2
10
Q
cos 90
A
0
11
Q
sin 180
A
0
12
Q
cos 180
A
-1
13
Q
sin^2+cos^2
A
1
14
Q
cos(-t)
A
cos t
15
Q
sin(-t)
A
-sint t
16
Q
cos(a-b)
A
cos a cos b+sin a sin b
17
Q
cos(pi/2-t)
A
sin t
18
Q
sin(pi/2-t)
A
cos t
19
Q
cos(a+b)
A
cos a cos b-sin a sin b
20
Q
sin(a-b)
A
sin a cos b-cos a sin b
21
Q
sin(a+b)
A
sin a cos b+cos a sin b
22
Q
sin2t
A
2sintcost
23
Q
cos2t
A
1-2sin^2t=cos^2-sin^2=2cos^2-1
24
Q
tg^2t
A
sin^2t/1-sin^2t=1-cos^2t/cos^2t
25
sint in functie de tg
2(tgx/2)/(1+tg^2x/2)
26
cost in functie de tg
(1-tg^2x/2)/(1+tg^2x/2)
27
sin a+sin b
2sin(a+b)/2cos(a-b)/2
28
sin a-sin b
2sin(a-b)/2cos(a+b)/2
29
cos a+cos b
2cos(a+b)/2cos(a-b)/2
30
cos a-cos b
-2sin(a+b)/2sin(a-b)/2
31
sinacosb
[sin(a+b)+sin(a-b)]/2
32
sinasinb
[cos(a-b)-cos(a+b)]/2
33
cosacosb
[cos(a-b)+cos(a+b)]/2
