We derive the addition formulas for sine and cosine from the arithmetic of complex numbers.

复数 算术 推导了正弦，余弦的加法公式。

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In addition to keeping an in-memory cache of "static" HTML pages, Domino can also cache pages that contain macro language (@function) formulas.

除了在内存中缓存静态 HTML 页面之外，Domino 还能够缓存包含宏语言（@function）公式的页面。

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A new identical Potentiometric standard addition method with ion-selective electrodes and its computation formulas are derived by mathematical method.

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。

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By setting up a few simple Excel formulas (nothing more complicated than addition and division, you can see what they look like in this sample spreadsheet), you can not only track your maintenance data (what the mechanics did, when they did it, how much it cost, and what the mileage was at the time) but also see your average daily mileage during each period between servicings.

CNN: Use your Mac to track your money

In addition, even those earning too much to demonstrate need under aid formulas "expect to see some sort of merit aid, " unless the school is highly selective, said Trey Chappell, a college adviser in Scottsdale, Ariz.

WSJ: Colleges Cut Prices by Providing More Financial Aid