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Am I expected to remember certain figures/dates for my exam?

If you don't know it, don't include it. The examiner will not be impressed with your ability to memorise a date down to the exact day/month/year, but will instead award marks for you ability in showing how t...
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Answered by Oscar R. • History tutor
7929 Views

What is historiography?

Historiography is simply the study of history itself. It's about looking at how historians have developed their ideas over time and what tools they have had at their disposal to best form an argument. Unlike...
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Answered by Oscar R. • History tutor
7190 Views

if x^2 + 9x + 20 = 0, what are the possible values of x?

So x 2 + 9x + 20 = 0 My preffered way of solving this equation is to factorise the equation. (Though I understand that different students may find other ways easier) Factorisation is where the above equation...
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Answered by Tilly P. • Maths tutor
11676 Views

How do I find the equation of a straight line?

Let's draw a line. It crosses the point (0,1), intercepting the y-axis (remember, y to the sky!) at 1 and the x-axis at the point (-2,0). An equation tells us what a line looks like, it's a way of describing...
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Answered by Dominique G. • Maths tutor
6909 Views

Given that d/dx(cosx)=-sinx show that d/dx(secx)=secx(tanx)

let y=sec(x) = 1/(cos(X)) = cos(x) -1 Thus dy/dx = -1(cos(x)) -2 (-sinx) = sin(x)/(cos(x)) 2 = 1/cos(x) x sin(x)/cos(x) =sec(x)tan(x)
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Answered by Owain D. • Maths tutor
13599 Views