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garylau
- 70
- 3
Moved from a technical forum, so homework template missing
in section 3vanhees71 said:Hm, I don't know what ##\theta## is. Also this should be posted in the home-work section of these forums. Thus I give only a hint:
I'd only do the quarter circle in cylindrical coordinates. All other parts of the path are very easily done in Cartesian ones. To give more specific hints, I'd need to know the conventions used concerning the angles (are ##\theta## and ##\phi## interchanged compared to the standard choice of spherical coordinates with ##\theta## the polar and ##\phi## the azimuthal angle?).
You're right. It's a mistake.garylau said:Where is pi/4 coming from in the line integral(section 3)?
because i think it should be 1/2=tan(theta) which theta is 26.5651...
The value of pi/4 in a line integral comes from the fact that it represents a quarter of a full rotation in the unit circle. In other words, pi/4 is the angle at which the line integral is being calculated, and it is equal to 45 degrees.
Pi/4 is related to the trigonometric functions in a line integral because it is the angle at which the line segment intersects with the unit circle. This angle is used to calculate the values of sine and cosine, which are essential for evaluating line integrals.
Pi/4 is commonly used in line integrals because it corresponds to a simple and symmetric angle in the unit circle. This makes it easier to calculate the values of trigonometric functions and simplifies the overall calculation process.
Yes, you can use a different angle instead of pi/4 in a line integral. However, pi/4 is the most commonly used angle because of its simplicity and symmetry. Using a different angle may complicate the calculation process and may not yield accurate results.
No, the value of pi/4 does not change in different line integrals. It remains constant at 45 degrees or the quarter of a full rotation in the unit circle. However, the way it is used in the calculation may vary depending on the specific line integral being evaluated.