# How to solve sin cos tan equations

Jan 27,  · Trigonometric ratios are important module in Maths. Here in this post, I will provide Trigonometric table from 0 to (cos -sin-cot-tan-sec-cosec) and also the easy and simple way to . A symbolic solver, like Mathematica or Maple, is an expert system with a lot of built-in rules ("knowledge") about algebra, calculus, etc; it "knows" that the derivative of sin is cos, that the derivative of kx^p is kpx^(p-1), and so on.

Trigonometric ratios are important module in Maths. Here in this post, I will provide Trigonometric table from 0 to cos -sin-cot-tan-sec-cosec and also the easy and simple way to remember it. How to easily remember trigonometric ratios table. Trigonometric table sin-cos-tan table for 0 to is given by. Now to remember the Trigonometric table for towe just to need to remember sign of the functions in the four quadrant.

We can use below phrase to remember. This table is very easy to remember, as each correspond to same function. The sign is decided by the corresponding sign of the trigonometric function of the angle in the quadrant. It is easy to remember and sign is decided by the angle quadrant. Since lies in II quadrant ,cos is negative. Here since sin is positive in II quadrant, we put positive sign. Here since tan is negative in II quadrant, we put negative sign.

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Join Stack Overflow to learn, share knowledge, and build your career. Connect and share knowledge within a single location that is structured and easy to search. How can I make a program in Python that can solve for x? I'm new to programming, and I looked at eval and exec but I can't figure out how to make them do what I want. I do not want to use external libraries e. How about SymPy? Their solver looks like what you need. Have a look at their source code if you want to build the library yourself….

To solve it numerically, you have to first encode it as a "runnable" function - stick a value in, get a value out. For example,. You then need another function which repeatedly plugs an x-value into your function, looks at the difference between the result and what it wants to find, and tweaks its x-value to hopefully minimize the difference. But in this case, the error minimization function is suitable and we get a good result:. Note that this solution is not absolutely, exactly correct.

If you need it to be perfect, or if you want to try solving families of equations analytically, you have to turn to a more complicated beast: a symbolic solver. When you give it an equation, it tries to find a path, a set of rule-applications, from where it is the equation to where you want to be the simplest possible form of the equation, which is hopefully the solution.

I hope this gives the flavor of the idea; the details of implementation finding a good, complete set of rules and deciding when each rule should be applied can easily consume many man-years of effort. There are a few different ways to solve equations. SymPy has already been mentioned, if you're looking for analytic solutions. If you're happy to just have a numerical solution, Numpy has a few routines that can help. If you're just interested in solutions to polynomials, numpy.

Specifically for the case you mentioned:. As a novice, this is beyond your ken. Use a different tool. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. How can I solve equations in Python? Asked 8 years, 11 months ago. Active 5 years, 10 months ago. Viewed k times. Improve this question. Li-aung Yip If you want to solve any equation you will have to build your own library.

Also 4. MikePennington: if he only wants to allow a very restricted set of equations, it's perfectly doable. In the abstract case, of course, you would have to build your own symbolic math engine a-la maxima or Mathematica , but I don't think that's the intent.

Add a comment. Active Oldest Votes. Improve this answer. Amusing to see an answer like this within minutes of all the snide comments on the question :D — naught Jan 30 '15 at There are two ways to approach this problem: numerically and symbolically.

Hugh Bothwell Hugh Bothwell Python may be good, but it isn't God Either way, you can't escape using a library. Pascal Bugnion Pascal Bugnion 4, 1 1 gold badge 20 20 silver badges 28 28 bronze badges. Unless you know your numerical methods hardcore, you can't, which anyways is probable to render a worse result than some robust library — zardilior Jan 5 '20 at The format must be as shown - no whitespace, no decimal numbers, no negative numbers.

Li-aung Yip Li-aung Yip As a beginner you should probably not attempt to solve such a non-trivial problem. The Overflow Blog. How often do people actually copy and paste from Stack Overflow? Now we know. Podcast One in four visitors to Stack Overflow copies code. Featured on Meta.

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