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goldfish9776
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Homework Statement
In this question, I didn't see why the given 90 degree is 90 degree becoz it doesn't look like 90 degree. Can someone draw me a better diagram? It's hard to visualize it's 90 degree
well , i still don't understand . take an example , alpha already more than 90 degree. How can the other angle be 90 degree? Can you explain in other words , so that i can understand better ?RUber said:They are trying to illustrate the 90 degree angles in 3D space. A common way to visualize this is to subractthe Z component, and you will clearly see the right angles in the x-y plane.
The angles are 90 degrees by definition. You should not question it just because when it is illustrated at a skew angle it doesn't look like the square angle you are used to.
The method being used is one that involves drawing a perpendicular line from the end of A to whichever axis you are interested in. Since your new coordinates are defined with angles to the vector A from a given axis, the definitions are given in terms of cosine(angle) = adjacent (axis) divided by magnitude (vector).
How do you know alpha is more than 90° ? Remember, these are not plane triangles you are looking at. They are triangles in three dimensions which are drawn on a two-dimensional page.goldfish9776 said:well , i still don't understand . take an example , alpha already more than 90 degree. How can the other angle be 90 degree? Can you explain in other words , so that i can understand better ?
A cartesian equation is a mathematical equation that describes the relationship between two or more variables on a cartesian plane. It is written in the form of y = mx + b, where m is the slope and b is the y-intercept.
To graph a cartesian equation, you need to plot points on a cartesian plane based on the given equation. You can do this by substituting different values for x and solving for y. Once you have a few points, you can connect them to create a line that represents the equation.
A linear cartesian equation is one that can be written in the form of y = mx + b, where m is the slope and b is the y-intercept. A non-linear cartesian equation is any equation that cannot be written in this form, such as a quadratic or exponential equation.
Yes, a cartesian equation can have more than two variables. In fact, a cartesian equation can have as many variables as needed to describe the relationship between them. However, when graphing a cartesian equation on a two-dimensional plane, only two variables can be represented.
The direction of a cartesian equation can be determined by looking at the slope of the line it represents. If the slope is positive, the line will be increasing from left to right. If the slope is negative, the line will be decreasing from left to right. If the slope is zero, the line will be horizontal. Additionally, the direction can also be determined by looking at the coefficients of the variables and their exponents in non-linear equations.