rop formula

Drunk. 1) the radius of a triangle is as follows: [(S-A) (s-B) (s-c)/S] ^ (1/2) S = (A + B + C)/22) in the incircle of the right triangle, there are two simple formulas: 1. The sum of the two sides of the right angle minus the oblique side divided by 2, the number is the radius of the incircle: R = (a + B-c)/2 (Note: S is the area of RT △, A and B are the two straight corner edges of RT △, and C is the oblique edges)2. Divide the product of the two sides by the circumference of the right triangl

I have been developing games for more than two years, and I have developed several games, but I have never spent any time learning game numbers. On the one hand, I have little data on this aspect, and I am also lazy, when I think of turning my previous High School, the University's math class is crazy. this year, I did not have a hard time rolling over documents and textbooks, joining groups, and completing this lesson for myself. it should be an entry point. haha. With the numerical thinking,

PHP formula verification code and Chinese character verification code implementation method In PHP website development, the verification code can effectively protect our forms from malicious submission. However, if you do not use the formula verification code or Chinese character verification code, you only need to use a simple letter or digit verification code, is this verification code solution r

1#include 2#include 3 using namespacestd;4 //calculates the integral of f (x) =1/x on [1,3]5 6 DoubleFDoublex) {7 return 1.0/(x+2);8 }9 Ten DoubleF1 (Doublex) { One return 1.0/(x+5); A } - DoubleF2 (Doublex) { - return 1.0/(x+7); the } - - DoubleF3 (Doublex) { - return 1.0/(x+9); + } - DoubleF4 (Doublex) { + return 1.0/(x+ One); A } at - intMain () { - //using three point Gauss Formula integral value -printf"%2.8f\n", (0

Illumination modelIn 3D rendering, the illumination of an object's surface is calculated as:I = Ambient Light (iambient) + Diffuse Reflection light (idiffuse) + specular highlight (ispecular);Where the ambient light (ambient) is calculated as:iambient = aintensity * ACOLOR; (aintensity indicates ambient light intensity, acolor indicates ambient light color)The diffuse light (diffuse) calculation formula is:Idiffuse = DINTENSITY*DCOLOR*N.L; (Dintensity

Problem: When a new document is created and a formula is inserted, you can use mathtype to edit it. After saving the document, the formula is opened for the second time. Double-click the formula, but you cannot edit the formula.Solution://////////////////////////////////////// //////////////////////////////////////// //////////////////////////////////////// /////

E ^ IX = cosx + is, e is the base of the natural logarithm, And I is the unit of virtual number. It expands the definite domain of trigonometric functions to the plural, establishes the relationship between trigonometric functions and exponential functions, and plays an important role in the theory of complex functions. E ^ IX = proof of cosx + ISX: Because e ^ x = 1 + x/1! + X ^ 2/2! + X ^ 3/3! + X ^ 4/4! + ...... Cos x = 2/2 ^! + X ^ 4/4! -X ^ 6/6 !...... SiN x = x-x ^ 3/3! + X ^ 5/5! -X ^

From: http://blog.sina.com.cn/s/blog_57e48d0b0100bgke.html has a small change. 1. First, display the ruler. Normally, it can be seen in the upper part of the word interface. 2. The cursor stops at the row where the formula is located. The specific position in the row is not required. 3. Select the tab format on the left side of the ruler. (This is like this) 3.1 select the center tab and click the left mouse button in the middle of the ruler t

are a few things you can refer to to recalculate Excel cell formulas using POI. Download the POI 3.11 related source code, set up a test environment in this machine, for tracking debugging. Found to be a exceltohtmlconverter class that always returns Cell.cell_type_error when getting the cachedformularesulttype of a cell containing a formula, Causes the method to get the value of the cell (that is, #value!) and return it only through Cell.geterrorcel

the characteristics of the content of the article reflected in different degrees, should have different weights The advantage of TF-IDF is that the algorithm is simple and the operation speed is fast Lucene in order to improve the programmable line, in the above rules do some expansion, is to add a number of programming interfaces to different queries to do a weighted normalization, but the core formula is still TF * IDF The Lucene algorithm

POJ 1845-Sumdiv (number theory, approximate number and formula, inverse element, High School Mathematics), poj1845-sumdivDescription Given A, B, calculate the sum of all the factors of A ^ B, and then MOD 9901Input A row has two integers, A and B.Output One row, an integerSample Input 2 3Sample output 15Prompt For 100% of data: 0 This question must first come up with a factor and a formula. F [a] = (1 +

Provides various official and user-released code examples. For code reference, you are welcome to exchange and learn. You know that simple numbers or letter verification codes are easily cracked, however, the formula verification code or Chinese Character Verification Code cannot be cracked, Therefore, we recommend that you use the formula verification code or Chinese Character Verification Code whenever p

Lucene TF-IDF Correlation Formula Lucene in keyword query, by default, using the TF-IDF algorithm to calculate the relevance of keywords and documents, using this data sorting TF: Word Frequency, IDF: reverse Document Frequency, TF-IDF is a statistical method, or knownVector Space ModelThe name sounds complicated, but it actually only contains two simple rules. So the TF-IDF correlation of a term is equal to TF * IDF These two rules are very simple, t

You can refer to the war-list formula 630 650 230 or the carrier formula is a certain probability, about 5%~6%. Of course, the above formula consumption is high, the Admiral can also use the formula to build, but the shipping rate will be lower. In addition, diving heavy gunboat construction time for 01:00:00, that

Test instructionsA circle of land, select n points in the circumference, and then 22 lines, asking how many pieces of this piece of land are divided?Analysis:First purple book on the formula is wrong, but according to the ideas provided in the book can be easily modified to get the correct answer!Then push the formula, here to use the Euler formula of the plan, v

1. Select the formula number, and in the Word toolbar, select Format--font--character spacing, set position to standard. Set the character spacing in the font to the standard after the number is selected 2. Select "Format"--"paragraph"--"Chinese layout", set text alignment to center. The formula number is centered with the formula. Set text align

In general, the relationship between recall and precision is as follows:1, if the need for a high degree of confidence, the precision will be very high, the corresponding recall rate is very low, 2, if the need to avoid false negative, the recall rate will be very high, the precision will be very low. on the right, the relationship between recall rate and precision ratio is shown in a learning algorithm. It is important to note that no learning algorithm can simultaneously guarantee high precisi

This article is provided by the MVP Jian June. Thanks to the MVP for sharing his/her technical information and personal experience. When making PowerPoint documents, we may need to insert some formulas, and there are several ways to insert formulas. Method One: Click the Insert tab, and then click the arrow under Formulas. The existing formula will be displayed, and you can click one of the formulas to insert into the PowerPoint document.

Sometimes you might want to do some simple calculations when editing a Word table. You can do this by using the formula Command (WORD2003) on the Table menu or the formula (Word2007) in the data group of the Layout tab of the Table tool. 　　Update fields manually at any time Unlike Excel, which automatically recalculates results after you change cell data, the data in the related cells is not automatically

One, can only use verb (ing) which language Formula Consider the proposal for forgiveness, admitting that the postponement is not a thought. Avoid missed continue to practice, negative completion stop appreciation. It is forbidden to think and take risks, but mind to abandon flight. Consider consider suggest suggestion/advocate advocated look forward to hope forgive forgive/pardon forgiveness Acknowledge admits/admit admits postpone delayed delay/dela