sine
US /saɪn/
・UK /saɪn/
C1 高級
n.名詞正弦
How can I work out the sine of this angle without a calculator?
影片字幕
會算數學還會跟你解說！看 OpenAI 全新 GPT-4o 算數學有多厲害！ (Math problems with GPT-4o)
- Now that you've identified all the sides relative to angle alpha do you remember the formula for finding the sine of an angle in a right triangle?
現在你已經確定了所有與角 alpha 有關的邊，還記得求直角三角形中一個角的正弦值的公式嗎？
- Yeah I know that the sine is equal to the opposite over the hypotenuse.
我知道正弦等於斜邊上的反弦。
無窮數列 (Infinite Series)
- Infinite series are also used to calculate trigonometric functions such as sine and cosine, which are very useful in determining the angles and lengths of triangles, as well as exponential functions, logarithms, and
好吧，讓我們試試一系列的術語一過n。
- Infinite series are also used to calculate trigonometric functions such as sine and cosine
無限級數也用於計算三角函數，如正弦和餘弦。
更廣泛的不確定性原理：關於傅立葉轉換！ (The more general uncertainty principle, regarding Fourier transforms)
- Anyway, point is, this spike you're looking at here, above the winding frequency of 5, is the Fourier transform's way of telling us that the dominant frequency of the signal is 5 beats per second, and equally importantly, the fact that it's a little spread out around that 5 is an indication that pure sine waves near 5 beats per second also correlate pretty well with the signal.
總之，重點是，你在這裡看到的高於繞組頻率 5 的尖峰，是傅立葉變換告訴我們信號的主頻是每秒 5 拍的方式，同樣重要的是，它在 5 拍附近有些分散，這表明每秒 5 拍附近的純正弦波也與信號有很好的相關性。
- And equally importantly, the fact that it's a little bit spread out around that 5 is an indication that pure sine waves near 5 beats per second also correlate pretty well with the signal.
不過大家都知道，如果是短脈衝，就意味著我們的傅立葉變換必須稍微分散一些。
微分方程總覽！ (Overview of Differential Equations)
- But F of Y could be Y squared or Y cubed or the sine of Y or the exponential of Y.
但 F of Y 可能會是 Y 平方、Y 立方、Y 的正弦函數，或是 Y 的指數函數。
- But f of y could be y squared, or y cubed, or the sine of y, or the exponential of y.
線性代表我們看到的是單獨的 Y。
失衡物理學大揭祕！ (The Physics Of Dissonance)
- This video will have four main parts – the dissonances between sine waves, the dissonances between notes, how dissonance leads to scales, and how dissonance leads to chords.
本視頻將分為四個主要部分--正弦波之間的不協和、音符之間的不協和、不協和如何導致音階以及不協和如何導致和絃。
- Part 1 – The Dissonance of Pure Sine Waves
第 1 部分 - 純正弦波的失諧
電容器完全解析！原來電容是這樣運作的？原理大公開！ (Capacitors Explained - The basics how capacitors work working principle)
- When we use a full bridge rectifier the AC sine wave is flipped to make the negative cycle flow in a positive direction.
當我們使用全橋整流器時，交流正弦波會翻轉，使負循環流向正方向。
- When we use a full bridge rectifier, the AC sine wave is flipped to make the negative cycle flow in a positive direction.
好了，夥計們，本期視頻就到這裡，如果想繼續學習，請查看螢幕上的視頻，我將在下一堂課中為大家介紹。
