<p>Using discriminant for solving quadratic equations for secondary school and IB programme</p>

<p>How to find the coordinates of the vertex of parabola</p>

<p>How to find tangent and normal line to the graph of a function at a given point</p>

<p>How to remember the values of sine and cosine</p>

<p>Solving a triangle using cosine rule</p>

<p>How to find the area of a triangle with two given sides and an angle between them</p>

<p>How to solve quadratic equations using Diskriminant formula</p>