The sine wave pattern seen is the result of viewing the orbital trajectory on a 2D surface. If the inclination of the satellite is 0 degrees, then the orbital path would appear as a straight line. Thus in fact the spacecraft move in elliptical orbits.
The Earth is round, but the maps that those diagrams are on are flat. The International Space Station uses a circular orbit, but when the route is shown on a flat surface it appears in a wave formation. If you draw a line around a fruit that you can easily peel and then peel the fruit and try and lay it out flat, you will see that the line is in a wave. The Earth is also rotating, so as the International Space Station orbits the Earth the places it passes over changes, which also has an affect on how the route appears.
I think you mean, :why does the orbit of satellites, etc. look like a sine wave? Well, every orbit around the earth looks like a circular (or elliptical ring) whose center (or focus) is at the center of the earth. An orbit exactly above the equator is one such orbit, but any orbit can be tilted as long as the center (or focus) stays at the earth's center and the whole orbit is flat like a disk. On various maps this makes the orbit look like a wave, but on a globe it stays a flat circle (or ellipse).
You're describing the wavelike line that shows up on the maps at mission control when theyplot the path of the spacecraft that they've just launched.Try to imagine this:The satellite is circling the earth at a constant rate ... say one orbit every couple of hours. At the same time,the earth is rotating under the satellite, one complete spin every 24 hours.Add these two motions together, and you'll see that a point on the ground ... if it always stays directly UNDERthe satellite ... will trace that 'wave' shape on the ground.
No, the Moon's path through space is not a spiral. The Moon orbits the Earth in an elliptical shape, following a consistent and predictable path. The perceived changes in the Moon's position in the sky are a result of its orbit and the rotation of the Earth.
It just looks like that, when the orbit is placed in a flat map. Like take a globe and flatten it, everything will be different from what it originally was. Here's a link to read about that. https://www.scienceabc.com/eyeopeners/why-do-satellites-orbits-look-like-a-sinusoidal-wave-on-the-world-map.html
The sine wave represents 360 degrees or a full circle. As the satellite revolves 360 degrees around the earth in its orbit this is how it is represented on a flat surface.
By shifting the sine wave by 45 degrees.
The Fourier transform of a sine wave is a pair of delta functions located at the positive and negative frequencies of the sine wave.
The Earth is round, but the maps that those diagrams are on are flat. The International Space Station uses a circular orbit, but when the route is shown on a flat surface it appears in a wave formation. If you draw a line around a fruit that you can easily peel and then peel the fruit and try and lay it out flat, you will see that the line is in a wave. The Earth is also rotating, so as the International Space Station orbits the Earth the places it passes over changes, which also has an affect on how the route appears.
A sine wave is the graph of y = sin(x). It demonstrates to cyclic nature of the sine function.
The voice is not a sine wave.
a phase shifted sine wave of a different amplitude.
Sine wave is considered as the AC signal because it starts at 0 amplitude and it captures the alternating nature of the signal. Cosine wave is just a phase shift of the sine wave and represents the same signal. So, either sine or cosine wave can be used to represent AC signals. However, sine wave is more conventionally used.
cos wave
A sine wave has no harmonics. It only has a fundamental, so the value of the 2nd, 3rd, and 12th harmonics of a sine wave is zero.
It's called a sine wave because the waveform can be reproduced as a graph of the sine or cosine functions sin(x) or cos (x).
The sine wave, with its repeating pattern, can represent a single frequency with no harmonics.