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Most of the time, English encourages students to be expressive and nuanced in the way they write. For A-Level, more so than GCSE, there are certain requirements put forth by different exam boards. Edexcel...

Using the substitution u = sec(z)=> du = sec(z)tan(z) dz.So, the integral ∫ y dz = ∫ sec(z)tan(z)/sqrt(sec(z)) dz=> ∫ y dz = ∫ 1/sqrt(u) du = 2sqrt(u) + C = 2sqrt(sec(z)) + C.

First, you will need to differentiate the function with respect to x. Finding dy/dx.For polynomials, this is done by taking one away from the old power and multiplying the coefficient by the old power and...

The ID operates in the unconscious and is responsible for instant gratification. It contains the libido, which forms our sexual desires. The super-ego is known as the 'morality principle' and punishes the...

Biopsychology and Neurology are actually a lot easier than they initially sound. I do not think it is necessary to study biology. It might help, but it certainly does not need to hold you back. It's under...