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Differentiation is used to find the gradient of a line, or curve. It can also be used to find the co-ordinates of stationary points, whether these be minimum, maximum or points of inflection. The second deri...

The SUVAT equations are used when acceleration is constant and velocity is changing. If speed is constant, you can use the speed, distance and time triangle. They can be used to work out initial and final sp...

Every complex number has complex square roots. However since we don't know how to deal with expressions such as √i we need to follow a specific method to find the square roots of a complex number. Let's cons...

Many grana, large surface area for photosynthetic pigments, electron carriers and ATP synthase enzymes. Photosynthetic pigments are arranged into structures called photosystems, allows maximum absorption of ...

There are two approaches to rationalising a denominator depending on how the denominator appears. First we deal with the simpler case where the surd term is the only term in the denominator. For example: 6/√...