Results

**11 - 13**of**13**### Yatsuka Nakamura

"... Summary. Two transformations between the complex space and 2-dimensional Euclidian topological space are defined. By them, the concept of argument is induced to 2dimensional vectors using argument of complex number. Similarly, the concept of an angle is introduced using the angle of two complex numb ..."

Abstract
- Add to MetaCart

(Show Context)
Summary. Two transformations between the complex space and 2-dimensional Euclidian topological space are defined. By them, the concept of argument is induced to 2dimensional vectors using argument of complex number. Similarly, the concept of an angle is introduced using the angle of two complex numbers. The concept of a triangle and related concepts are also defined in n-dimensional Euclidian topological spaces.

### 1. MONOTONE INCREASING AND MONOTONE DECREASING OF SINUS AND COSINE

"... Summary. This article introduces the monotone increasing and the monotone decreasing of sinus and cosine, and definitions of hyperbolic sinus, hyperbolic cosine and hyperbolic tangent, and some related formulas about them. ..."

Abstract
- Add to MetaCart

(Show Context)
Summary. This article introduces the monotone increasing and the monotone decreasing of sinus and cosine, and definitions of hyperbolic sinus, hyperbolic cosine and hyperbolic tangent, and some related formulas about them.

### DOI:????? Difference and Difference Quotient – Part III

"... Summary. In this article, we give some important theorems of forward difference, backward difference, central difference and difference quotient and forward difference, backward difference, central difference and difference quotient formulas of some special functions. ..."

Abstract
- Add to MetaCart

(Show Context)
Summary. In this article, we give some important theorems of forward difference, backward difference, central difference and difference quotient and forward difference, backward difference, central difference and difference quotient formulas of some special functions.