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Being tired of memorizing these formulas? See how a unit circle and the complex numbers can help.
$\begin{array}{1}\sin(\alpha+\beta)=\sin\alpha\cos\beta+\cos\alpha\sin\beta\\cos(\alpha+\beta)=\cos\alpha\cos\beta-\sin\alpha\sin\beta\end{array}$

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JavaScript, often abbreviated as JS, is a programming language that conforms to the ECMAScript specification. Alongside HTML and CSS, JavaScript is one of the core technologies of the World Wide Web. HTML is responsible for the structures, CSS is responsible for the decorations, and JavaScript is responsible for the interactions.

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Java Comparable interface is used to order the objects of the user-defined class. This interface is found in java. lang package and contains only one method named compareTo(Object). It provides a single sorting sequence only, i.e., you can sort the elements on the basis of single data member only. This post show an example of sorting apples by their types (string), colors (enum) and weights (int).

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