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Get a line a form y=-ax/b-c/b, then substitute into a cirle equation (x-p)^2 +(y-s)^2=r^2. Get a quadratic and find whether a discriminant is equal to zero. If it is then the line is tangent to a circle. ...

The important part to any History A-Level is the structure, as it not only shows the examiner your understanding of the question but also your level of knowledge. As an effectively structured argument can...

Before we start on the specifics of the experiment itself we need to understand how DNA replication occurs on a molecular level. DNA is made up of four different bases; A, C, G and T....

With the Section B questions you will be asked to engage with a set of sources that are related to a historical debate relevant to your course. Before jumping straight into answering the question though y...

It should be said that it is not always trigged by that construction, since the subjunctive only follows this clause if there is a change in subject (i.e. quiero que tu hagas/usted haga/él haga/ella haga/...