Siemens SINUMERIK 840D - Page 73

840D/828D SINUMERIK Operate Page 5
B504
B504
Notes
Trigonometrical functions
Section 4
The trigonometrical ratios describe the relationships between the angles
and the sides in a right angled triangle. With the aid of these trigonometri-
cal functions it is possible to calculate both angles and sides in a right an-
gled triangle. For this one side and an angle or two sides must be known.
The selection of the suitable trigonometrical function, i.e. the sine, cosine
or tangent, depends on which sides and angles are known and which side
or angle is to be found.
By the use of the various trigonometrical functions all pages and sides can
be determined.
3
2
1
α
1. Adjacent side (AS)
2. Hypotenuse (H)
3. Opposite side (OS)
α Angle
β Angle
β
Sine function
Cosine function
Tangent function
H
OS
αsin
sin
OS
H
H*αsinOS
H
AS
cos
HAS *cos
AS
OS
tan
tan
OS
AS
ASOS *tan
cos
AS
H