2-(Dicyanomethylene)croconate is a divalent anion with chemical formula C8N2O2−4 or ((N≡C−)2C=)(C5O4)2−. It is one of the pseudo-oxocarbon anions, as it can be described as a derivative of the croconate oxocarbon anion C5O2−5 through the replacement of one oxygen atom by a group =C(−C≡N)2. The anion was synthesized and characterized by A. Fatiadi in 1980, by hydrolysis of croconate violet treated with potassium hydroxide. It gives an orange solution in water. (Wikipedia).

Something Nasty in the Attic - WW2 German Incendiary Bombs 2022

77 years after the end of WW2, German incendiary bombs keep being found in attics, gardens and sheds across the UK. Find out the full story here. Dr. Mark Felton is a well-known British historian, the author of 22 non-fiction books, including bestsellers 'Zero Night' and 'Castle of the Ea

From playlist Nazi Weapons

Regina Rotman (5/28/22): Curvature bounds and the length of the shortest closed geodesic

I will discuss upper bounds for the length of the shortest periodic geodesic on closed Riemannian manifolds with various curvature bounds. In particular, I will present an upper bound for the length of the shortest closed geodesic on Riemannian manifolds with a positive Ricci curvature as

From playlist Vietoris-Rips Seminar

Introduction to Solving Linear Diophantine Equations Using Congruence

This video defines a linear Diophantine equation and explains how to solve a linear Diophantine equation using congruence. mathispower4u.com

From playlist Additional Topics: Generating Functions and Intro to Number Theory (Discrete Math)

How to solve a trigonometric equation when it is already solved cos

👉 Learn how to solve trigonometric equations. There are various methods that can be used to evaluate trigonometric identities, they include by factoring out the GCF and simplifying the factored equation. Another method is to use a trigonometric identity to reduce and then simplify the give

From playlist Solve Trigonometric Equations

Using the Box Method to Multiply a Trinomial by a Trinomial - Math Tutorial

👉 Learn how to multiply polynomials. To multiply polynomials, we use the distributive property. The distributive property is essential for multiplying polynomials. The distributive property is the use of each term of one of the polynomials to multiply all the terms of the other polynomial.

From playlist How to Multiply a Trinomial by a Trinomial

How to solve trigonometric equations with cosecant

👉 Learn how to solve trigonometric equations. There are various methods that can be used to evaluate trigonometric identities, they include by factoring out the GCF and simplifying the factored equation. Another method is to use a trigonometric identity to reduce and then simplify the give

From playlist Solve Trigonometric Equations

Finding the solutions to a trigonometric equation

👉 Learn how to solve trigonometric equations by factoring out the GCF. When solving trigonometric equations involving the multiples of the same trigonometric function. It is very useful to collect similar trigonometric functions together and then factor out the GCF. This enables us to use

From playlist Solve Trigonometric Equations

Easiest Way to Multiply Two Trinomials by Each Other - Math Tutorial

👉 Learn how to multiply polynomials. To multiply polynomials, we use the distributive property. The distributive property is essential for multiplying polynomials. The distributive property is the use of each term of one of the polynomials to multiply all the terms of the other polynomial.

From playlist How to Multiply a Trinomial by a Trinomial

Learn how to solve trigonometric equation with cosine on both sides

👉 Learn how to solve trigonometric equations by factoring out the GCF. When solving trigonometric equations involving the multiples of the same trigonometric function. It is very useful to collect similar trigonometric functions together and then factor out the GCF. This enables us to use

From playlist Solve Trigonometric Equations

How to Multiply Two Monomials by a Trinomial and Binomial

👉 Learn how to multiply polynomials. We apply the distributive property to polynomials by multiplying a monomial to every term in a polynomial. When multiplying monomials it is important that we multiply the coefficients and apply the rules of exponents to add the powers of each variable.

From playlist How to Multiply Polynomials

Solving a trigonometric equation with applying pythagorean identity

👉 Learn how to solve trigonometric equations. There are various methods that can be used to evaluate trigonometric equations, they include factoring out the GCF and simplifying the factored equation. Another method is to use a trigonometric identity to reduce and then simplify the given eq

From playlist Solve Trigonometric Equations by Factoring

Calculus AB Homework 3.1 Derivative Rules

Download Packet: https://goo.gl/5At53F ================================= AP Calculus AB / IB Math SL Unit 3: Derivative Rules Lesson 1: Elementary Derivative Rules =================================

From playlist AP Calculus AB

Lec-15 Solution of a System of Linear Algebraic Equations-Part-5

Lecture series on Numerical Methods and Computation by Prof.S.R.K.Iyengar, Department of Mathematics, IIT Delhi. For more details on NPTEL visit http://nptel.iitm.ac.in

From playlist Core - Numerical Methods and Computation

Trig substitution - How to solve?

► My Integrals course: https://www.kristakingmath.com/integrals-course Trigonometric substitution (more affectionately known as trig substitution, or trig sub), is another integration method you can use to simplify integrals. It’s like u-substitution, integration by parts, or partial frac

From playlist Integrals

Surds (Part 6) Rationalising the Denominator 2 - 10 Minute Maths Series | GCSE Maths Tutor

A video revising the techniques and strategies for rationalising harder fractions with surds. These are the calculators that I recommend: Casio fx-83GTX Scientific Calculator, Black - https://amzn.to/2P2cyGG Casio Fx-991ex Scientific Calculator Fx 991 Ex - New + 552 Function - Classwiz -

From playlist GCSE Maths Videos

C1 Surds and Indicies AS Level Maths revision Exam paper practice & help

Edexcel C1 Surds and Indicies AS Level Maths revision Exam paper practice & help. AS - C1 playlist - https://www.youtube.com/playlist?list=PL2De0DVeFj3VVisruoDveJ_5U_2PAZb9k 21 Exam questions that take you through all the types of questions on this topic at this level. Here is a link to th

From playlist C1 Edexcel AS Maths Exam paper practice questions.

Calculus AB Homework 3.2 The Product Rule

Download Packet: https://goo.gl/5At53F ================================= AP Calculus AB / IB Math SL Unit 3: Derivative Rules Lesson 2: The Product Rule =================================

From playlist AP Calculus AB

Core 3 Past Paper Questions - Trig double angle

Powered by https://www.numerise.com/ All past paper solutions to double angle and addition trig equations. www.hegartymaths.com http://www.hegartymaths.com/

From playlist Core 3 Edexcel Maths Past Paper Exam Solutions By Topic

Number Theory | Linear Diophantine Equations

We explore the solvability of the linear Diophantine equation ax+by=c

From playlist Divisibility and the Euclidean Algorithm

The 5 Hardest Surds Questions | Grade 7-9 Maths Series | GCSE Maths Tutor

A video revising the techniques and strategies for answering some of the hardest surds questions. (Higher Only) Don’t forget to check out the rest of the surds series below! These are the calculators that I recommend: Casio fx-83GTX Scientific Calculator, Black - https://amzn.to/2P2cyGG

From playlist GCSE Maths Videos