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There are many different ways of approaching extract questions and some will work better for some more than others. However, there are steps that you can follow which will help to ensure that all the AO`s ar...

Complete the square:x 2 +4x gives (x+2) 2 -4y 2 +2y gives (y+1) 2 -1Therefore,(x+2) 2 -4+(y+1) 2 -1=20Rearranging gives:(x+2) 2 +(y+1) 2 =25Comparing to the standard equation for a circle:(x-a) 2 +(y-b) 2 =r...

Region which a force acts on a charged particle and the force is same at all points.

Finding the solutions to trig equations begins in a very similar way to when we do it at GCSE. We start with:cos(2x) = 2 -1/2 0 <= x <=piand correct our range, as we are interested in 2x not just x: 0 ...

We define a perfectly competitive market as a market which fulfils the six following conditions: 1) Large number of sellers and buyers. 2) Homogenous product: All of the goods sold within the market are iden...