Top answers

Whats the difference between the three main trigonometric functions?

Sin(x), Cos(x) and Tan(x) are very useful functions and can be used to solve algerbraic problems where the aim is to find the size of an angle or a size. Sin(x) = Opposite/Hypotenuse Cos(x) = Adjacent/Hypote...
MG
Answered by Michael G. • Maths tutor
5200 Views

How do I know which trig formula to use in the exam?

When faced with a problem that involves triangles, there is a simple flowchart you can follow to determine which formula or identity you need to use! Firstly you must ask yourself whether the triangle has a ...
JO
Answered by Joseph O. • Maths tutor
14202 Views

Solve algebraically 6a + b = 16 and 5a - 2b = 19

This is a simultanious equation. As there are two unknown variables, it is impossible to find both a and b just using one of the equations. To make it possible to work out the unknowns, we need to have just ...
KH
Answered by Kate H. • Maths tutor
6571 Views

How can I solve simultaneous equations?

We can solve simultaneous equations in two different ways. We can either eliminate one of the unknowns or use substitution. It is about finding which method you are most comfortable with and practicing that ...
MM
Answered by Meabh M. • Maths tutor
6635 Views

Where does the quadratic equation come from?

This is a quick derivation of the quadratic formula for an GCSE Maths students looking to stretch themselves a little and go for that A*! If we have a general quadratic equation: ax 2 +bx+c=0 (eq1) You will ...
RM
Answered by Ryan M. • Maths tutor
5439 Views