Geoscience Reference
In-Depth Information
2.5.3 Additionstheoreme
Trigonometrische Funktionen von Winkelsummen
sin (
)
sincos
+
cossin
+
=
cos (
)
+
=
coscos
sinsin
sin (
)
=
sincos
cossin
cos (
)
=
coscos
+
sinsin
tan
+
tan
tan (
)
+
=
1
tantan
cotcot
1
cot (
)
+
=
cot
+
cot
tan
tan
tan(
)
=
1
+
tantan
cotcot
+
1
cot (
)
=
cot
cot
Trigonometrische Funktionen des doppelten und des halben Winkels
2sin
2 cos
sin 2
=
2sincos
sin
=
2
cos 2
2
sin 2
2
cos 2
cos 2
sin 2
cos
=
=
2sin 2
2
2sin 2
cos 2
=
1
cos
=
1
2cos 2
2
2cos 2
1
cos 2
=
1
cos
=
2cos 2
2
1
+
cos 2
=
2cos 2
1
+
cos
=
2sin 2
2
2sin 2
1
cos 2
=
1
cos
=
sin
2
1
cos
2
=
cos
2
1
+
cos
2
=
tan
2
1
cos
=
1
+
cos
cot
2
1
+
cos
=
1
cos
2sin
+
2 cos
sin
+
sin
=
2
2cos
+
2 sin
sin
sin
=
2
2cos
+
2 cos
cos
+
cos
=
2
2sin
2 sin
+
cos
cos
=
2
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