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Formule di Trigonometria
sin 2 cos2 1
cos
0
30
0
6
4
3
2
45
60
90
1
1 tan2
sin
sin
0
1
2
1
1
1
0
1 cos
2
1 cos
cos
2
2
1 cos
1 cos
1 cos
tan
2 sin
sin
1 cos
Formule di triplicazione
sin3 3sin 4 sin3
cos3 4 cos3 3cos
2
2
3
2
2 tan
1 tan 2
Formule di bisezione
2
cot
tan 2
1 tan2
tan
0
3
3
cos2 sin 2
cos 2 2 cos2 1
2
1 2 sin
tan
cos
1
3
2
2
2
1
2
Formule di duplicazione
sin 2 2 sin cos
sin
cos 1 sin2
sin 1 cos2
Formule di addizione
cos( ) cos cos sin sin
cos( ) cos cos sin sin
sin( ) sin cos sin cos
sin( ) sin cos sin cos
3
tan tan
1 tan tan
tan tan
tan( )
1 tan tan
tan( )
3
3
3
0
Formule parametriche
2t
sin
1 t 2
1 t 2
t tan
cos
2
2
1 t
2t
tan
1 t 2
Formule di prostaferesi
pq
pq
sin p sin q 2 sin
cos
2
2
pq
pq
sin p sin q 2 sin
cos
2
2
pq
pq
cos p cos q 2 cos
cos
2
2
pq
pq
cos p cos q 2 sin
sin
2
2
Triangoli rettangoli
C
A
c
a
b
A
Triangoli qualunque
c
B
b a sin a cos c tan
b
b
b
a
; tan
sin cos
c
c a sin a cos b tan
c
c
c
a
; tan
sin cos
b
B
b
a
C
a
b
c
sin sin sin
a 2 b 2 c 2 2bc cos
b 2 a 2 c 2 2ac cos
c 2 a 2 b 2 2ab cos
1
Area (ABC) bc sin
2
1
ac sin
2
1
ab sin
2
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