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# A level Maths Revision

## How to solve quadratics by completing the square

How to solve quadratics by completing the square Completing the square is one of the most versatile technique in quadratic equations and expressions. By completing the square we can solve a quadratic function to find the: roots of the quadratic function turning points (maximum or minimum point) of the quadratic function Before we start solving …

## Proving Trigonometrical Identities (A level)

Proving Trigonometrical Identities (A level) Proving trigonometrical identities requires you to use mathematical and logical steps to prove that one side of the identity can be simplified into the other side of the equation. Logically you cannot work from both sides of the identity at the same time. Since we will be simplifying one side …