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When you get into the exam, you will always have more than one option to choose from. Always take 5 minutes to read the questions carefully, select one and write a quick plan. There's no need to panic, as...

First, we note the centre of the circle is at the origin (0,0). Then we calculate the gradient of the line OP, the line connecting the origin to P. The gradient = change in y / change in x = (√7 - 0) / (3...

The Multistore Memory Model was proposed by Atkinson and Shiffrin in 1968. It is made up of 3 stores: the sensory register, the short-term memory (STM) and long-term memory (LTM). Information is detected ...

We know sin(x)^2+cos(x)^2=1Dividing by cos(x)^2: tan(x)^2+1=sec(x)^2Substitute into the Equation and Rearrange to get: tan(x)^2-2*tan(x)-3=0Let y = tan(x): y^2-2y-3=0Factorising: (y-3)(y+1)=0so y = 3 and ...

The difference is the scope. A local variable can only be seen within its scope, for example a variable defined in a method can only be seen within this method. However, a global variable can be seen by e...