Subject of occupations:

Subject of the previous lesson

Terminating trigonometric functions

Lesson 5

**TRIGONOMETRIC FUNCTIONS IN A RECTANGLE**Subject of the previous lesson

Terminating trigonometric functions

Lesson 5

**THE INFINITE TRIGONOMETRIC FUNCTIONS**If to divide rectangle elements with simple diagonal into terminating trigonometric functions, the infinite trigonometric functions will turn out.

Transition from terminating trigonometric functions to the infinite |

The tangent and cotangent can be presented as the party of a rectangle when as a unit of measure of length length of the perpendicular party is accepted. This geometrical representation of a tangent and cotangent can be considered as visual display of interaction between numbers (the infinite trigonometric functions) and units of measure (unit) as a result of which size appears. Other option of geometrical representation of size is shown in earlier published work.

The tangent and cotangent |

Similar representation of numbers and units of measure possesses property of a rectangular symmetry. Value of a angle the alpha in this case characterizes a dependence angle between number and a unit of measure.

At the following lesson we will consider

Quantity

Quantity

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