Problem 3 Notice that tan(1) = π/4, this means we can calculate π by using 4 × arctan(1) So this means that if we find Taylor series expansion of arctan(x) around x = 0, then we can calculate π to any accuracy we want. 3.1) Find taylor expansion of arctan for 3 non-zero terms. If you forgot, 1 3.2) Guess the rest of the terms 1 d dx 1 arctan(2) 1+x² 3.3) Calculate π using taylor approximation for 200 non-zero terms. (you must write some sort of for loop to do it). 1 Python Python Python

Problem 3 Notice that tan(1) = π/4, this means we can calculate π by using 4 × arctan(1) So this means that if we find Taylor series expansion of arctan(x) around x = 0, then we can calculate π to any accuracy we want. 3.1) Find taylor expansion of arctan for 3 non-zero terms. If you forgot, 1 3.2) Guess the rest of the terms 1 d dx 1 arctan(2) 1+x² 3.3) Calculate π using taylor approximation for 200 non-zero terms. (you must write some sort of for loop to do it). 1 Python Python Python

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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import Prelude hiding (lookup) data Exp = Num Int | Add Exp Exp | Sub Exp Exp | Mul Exp Exp | Div Exp Exp | Var String | Let String Exp Exp | App Exp Exp | Fnc String Exp deriving (Show) type Env = [(String, Val)] data Val = CVal Int | FnVal String Exp Env | Error String deriving (Show) {-Implement a function lookup:: Env -> String -> Val that looks up the value of a variable within a context. This function returns the value of the variable if found and returns an error otherwise. -} lookup :: Env -> String -> Val -- code here-- {- Implement a function eval:: Exp -> Env -> Val to evaluate an expression with an initial context and return a value. Errors occur in the following cases: (a) Left-hand-side of a function application is not a function. (b) Use an undefined variable (c) Arithmetic expression where operand is not a number -} eval :: Env-> Exp -> Val -- code here --
Solution in Java Implement a method removeWord() that takes two string parameters: sentence the sentence you are to remove a word word - the word you are to remove from the sentence. Your method should take a string, sentence and remove word from it. It will return a new string without word in the sentence. Examples removeWord("One two three four", "two") → "One three from. four" removeWord("Bob has a kid", "kid") → "Bob has a"
preLabC.java U 1 import java.util. Random; 2 3 4 public class preLabC { 5 6 ▼ 7 8 9 10 11 12 13 import java.util.StringJoiner; 14 15 16 17 18 19 20 } public static String myMethod(MathVector inputVector) { String vectorStringValue = new String(); // empty String object System.out.println("here is the contents object, inputVector: + inputVector); // get a String out of that MathVector object. Do it here. } // return the double value here. return vectorStringValue; On the next line. ▸ Compilation ▾ Description A MathVector object will be passed to your method. Return its contents as a String. If you look in the file MathVector.java you'll see there is a way to output the contents of a MathVector object as a String. This makes it useful for displaying to the user. /*** * Returns a String representation of this vector. The String should be in the format "[1, 2, 3]" * * @return a String representation of this vector * @apiNote **DO NOT** use the built-in (@code Arrays.toString()} method. */…
%matplotlib inlineimport mathimport numpy as npfrom matplotlib import pyplot as pltdef bad_poisson(lmd, k): return pow(lmd,k)*math.exp(-lmd)/math.factorial(k)# bad_poisson(1000,1000) # uncomment to see it breaks
import randomdef heads_or_tails(n): i=0 n = 'n' while i<n: num = random.randint(0,1) if num==0: print('heads') else: print('tails') i+=1 if __name__ == '__main__': random.seed(1) number_of_flips = int(input()) heads_or_tails(number_of_flips) it says Traceback (most recent call last): File "main.py", line 16, in <module> heads_or_tails(number_of_flips) File "main.py", line 5, in heads_or_tails while i<n: TypeError: '<' not supported between instances of 'int' and 'str'
my code doesn't produce a sounds. Please fix my code: python language from playsound import playsoundfrom tkinter import * root = Tk()topframe=Frame(root)topframe.pack(side=TOP) def play():playsound("Tiger Roar Sound Effect.mp3") redbtn = Button(topframe,text="Lion",fg="Red")redbtn.pack(pady=20) def play():playsound("Horse Sounds for children.mp3") brownbtn=Button(topframe,text="Horse",fg="brown")brownbtn.pack(pady=20) def play():playsound("Angry Cat - Ringtone.mp3")greybtn=Button(topframe,text="Cat",fg="Grey")greybtn.pack(pady=20) root.mainloop()
%matplotlib inlineimport numpy as npfrom matplotlib import pyplot as pltimport math
2. Problem 2: In this problem you will test our "in class" version of Gaussian elimination against the version in numpy. Use both codes to solve some randomly chosen linear systems of size N 10, 20, 40, 80, 160, 320, 640, 1280, 2560, and 5120. Depending on your computer, the last two may or may not work. If they don't, just say so in your report. If you computer can do N- 10240 then try this as well. Note that in cach case N 10 * 2k for k = 1,..., 10. That is, each time we are doubling the size of the matrix. abone Plot the results as two curves. Our code in red and numPy in bluc. (Or whatever colors you prefer). Can you guess the function which governs the runtime? Based on this guess, how long would it take to do N 40960 using numPy? N=81920?
1 IN JAVA ----- Write a method of public class called "isInputOneValid" that verifies if a string parameter called "inputOne" is included inside an array called "tableOne". Return as a boolean (if valid, return true, if not, false)