Journal of Formalized Mathematics
Volume 11, 1999
University of Bialystok
Copyright (c) 1999 Association of Mizar Users

## Properties of the Trigonometric Function

Takashi Mitsuishi
Shinshu University, Nagano
Yuguang Yang
Shinshu University, Nagano

### Summary.

This article introduces the monotone increasing and the monotone decreasing of {\em sinus} and {\em cosine}, and definitions of hyperbolic {\em sinus}, hyperbolic {\em cosine} and hyperbolic {\em tangent}, and some related formulas about them.

#### MML Identifier: SIN_COS2

The terminology and notation used in this paper have been introduced in the following articles [9] [12] [1] [10] [2] [13] [6] [7] [11] [5] [8] [4] [14] [3]

#### Contents (PDF format)

1. Monotone Increasing and Monotone Decreasing of Sinus and Cosine
2. Hyperbolic Sinus, Hyperbolic Cosine and Hyperbolic Tangent

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