Trigonometric formula

A Discussion on the Integration of the Rational Formula of Trigonometric Function

对三角函数有理式不定积分的探讨

Two trigonometric identities and Euler formula' proof

两个三角恒等式及Euler公式的推广

The Series Formula and Trigonometric Function Formula of Tooth Harmonic e. m. f. of Synchronous Machine

同步电机齿谐波电势的级数公式和三角函数公式

Based on the stress partial tensor's trigonometric function answer, the main stress and main direction are established in parsed currency formula, and some special answers and examples are discussed.

在应力偏张量主值三角函数解的基础上，推导了应力空间内主应力和主方向的通用解析解公式。

As no trigonometric function in the formula results in easy and accurate calculation result, it is especially suitable for workshop applications.

量块组尺寸计算公式不含三角函数，计算简便、结果精确，特别适合车间现场使用。