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A Visual Guide to the Meaning of Cosine
Cosine is one of the fundamental trigonometric functions, and it’s all about the relationship between an angle and the sides of a right triangle. In simple terms, the cosine of an angle tells you how much of that angle is “pushing” in the horizontal direction. Imagine a right triangle. If you know one of the angles, the cosine of that ...
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Explaining The Universe on Instagram: "Sine and cosine waves are identical in shape, amplitude, and frequency, differing only by a phase shift. A sine wave starts at zero and rises, while a cosine wave starts at its maximum value. Mathematically, a cosine wave is just a sine wave shifted left by 90 degrees (π/2 radians). Because of this, the choice between sine and cosine usually depends on where the motion or signal begins in time. In physics and engineering, sine waves are often used when a sy
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