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Rearrange the expression to create a familiar function with a known differencial: arcos(x)=y x= cos(y) Differenciate x with respect to y: dx/dy= -sin(y) We know that dy/dx= 1/(dx/dy), so rearange to find an ...

A question which blights both GCSE and A Level students and becomes particularly relevant when doing translation work. The imperfect tense refers to actions that took place over a long period in the past, an...

There are four main different processes of erosion in a river: abrasion, attrition, hydraulic action and solution.Abrasion is when large particles (stones and rocks) being transported in the river's load are...

In this question, we are going to find the values of x and y from the equations above. To start off, we will number the equations:(1): 2x+y=18(2): x-y=6now we will add (1) to (2) as that will get ride of the...

In order to weigh up which factor was the most important you need to look at each factor separately and decide to what extent that effected the problem in question. For example, if you were looking at what f...