100

Ebene Trigonometrie.

4. Zusammenhang der Punktionen:sin s a-fcos !! a = l

a 1

tga =

ctg a =tg a ■ ctg a = 1

cos aCOS a

ctga1

sina tga

1 + tg'«:

l+ctg s a=-^

cos'ct1

sin a

cos a

tg«

ctg a

tg«

1

Vi — cos 2 a

Vl+tg"o

VI + Ctg 2 a

1

ctga

Vl + Cig 2 a

}'l — sin'' a

VT+Va

sin a

1

ctg a

tg ct =

V 1 — cos'' 1 acos a

|/1 — sin 2 a

cos a

1

tg a

ctg a =

\l\ — sin 2 asin a

|'l —C08 8 a

h-Stf&Qß