复数算术推导了正弦，余弦的加法公式。
We derive the addition formulas for sine and cosine from the arithmetic of complex numbers.
概率加法公式和互逆加法公式的运用五个方面的教学问题。
The addition formula of Probability and the addition formula of Mutual Converse.
给出了条件概率的加法公式、乘法公式和一般的全概率公式。
Some formulas on conditional probability were established and a generalized total probability formula was given.
在求解概率问题时，掌握逆事件公式与加法公式的运用，会使问题变得简单。
It can help easily solve the probability problem to master inverse-event formula and plus formula.
在求解概率问题时，掌握逆事件公式与加法公式的运用，会使问题变得简单。但是应根据问题实质，灵活运用，避免盲目与机械。
It can help easily solve the probability problem to master inverse-event formula and plus formula. Yet the formulas should be utilized flexibly not blindly.
采用正弦和余弦的泰勒展开式构造的迭代公式，计算一个绘图点只需9次加法。
Adopt the iterative formula that forms Taylor's expansion of sine and cosine, and compute a graphic points are only calculated by 9 times addition.
应用数学方法研究离子电极测量技术中的等电势标准添加法，推导出新的计算公式。
A new identical Potentiometric standard addition method with ion-selective electrodes and its computation formulas are derived by mathematical method.
勃郎特-维西克研究的条形基础极限承载力属于平面应变问题，采用分步叠加法，求得地基极限承载力公式。
Prandtl-Vesic of ultimate bearing capacity of strip foundation belongs to the plane strain problems, which adopt step superposition method to obtain the formula of ultimate bearing capacity.
勃郎特-维西克研究的条形基础极限承载力属于平面应变问题，采用分步叠加法，求得地基极限承载力公式。
Prandtl-Vesic of ultimate bearing capacity of strip foundation belongs to the plane strain problems, which adopt step superposition method to obtain the formula of ultimate bearing capacity.
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