Search our library of A Level questions

Top answers

All subjects

A Level

To what extent should the period of Conservative dominance between 1951 and 1964 be viewed as "Thirteen Wasted Years"?

This first thing to do when answering an essay question is to read and analyse the question, and to understand what it is that the examiner is asking and looking for. It is helpful to break down the title...

Answered by Annabel M. • History tutor

4865 Views

How do I write an A* grade essay?

The key to writing a successful essay at A-level & GCSE is to always have the Assessment Objectives in your head (it might even help to write them down as part of your plan). It is a common complaint ...

Answered by James T. • English Literature tutor

9248 Views

A Curve has parametric equation x=2sin(t), y= 1+cos(2t), -pi/2<=t<=pi/2. a) Find dy/dx when t=pi/3. b) Find the Cartesian equation for the curve in form y=f(x), -k<=x<=k. c) Find the range of f(x)

x=2sin(t), y=1+cos(2t)

a) By chain rule, dy/dx = (dy/dt)/(dx/dt)
dy/dt = -2sin(2t), dx/dt= 2cos(t)
dy/dx= -sin(2t)/cos(t)
dy/dx=-2sin(t)cos(t)/cos(t)
dy/dx=-2sin(t)

Answered by Max B. • Maths tutor

10986 Views

Find the first and second derivatives of: y = 6 - 3x -4x^-3, and find the x coordinates of the line's turning points

dy/dx = -3 +12x^-4 d^2y/dx^2 = -48x^-5

Answered by Matthew S. • Maths tutor

3714 Views

Discuss the causes and associated health problems of atherosclerosis

Causes- Too much cholesterol in the blood. This can be as a result of high LDL and low HDL levels in the blood. or as it is more known as a high LDL:HDL ratio.

LDL are not very good for you and a ...

Answered by Loubna K. • Human Biology tutor

3419 Views