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tanx = sinx/cosx. Express this as: sinx*(cosx)^-1. Remembering the product rule: "y = f(x)g(x), dy/dx = f'(x)g(x) + f(x)g'(x)". sinx differentiates to cosx and cosx differentiates to -sinx. Also, r...

Writing a personal statement for any course is a daunting task and when the course you're applying for has a 10 people applying for every 1 place, it can at times seem impossible. As a current medical studen...

Chlorine, Cl, and Florine, F are both in group 7 of the periodic table so they have 7 electrons in the outer energy level, called valence electrons. Each fluorine atom makes one covalent bond to the chlorine...

This is a handy trick for quadratic equations ax^2 + bx + c = 0. e.g. (x^2 + 5x + 6). So a = 1, b = 5 and c = 6. To complete the square, let x^2 + 5x + 6 = 0. Then, take 6 to the other side to get x^2 + 5x =...

You usually know that a verb is in the second group when it finishes by "-ir". However, some verbs of the third group also end by "-ir". The differentiation is then possible when you look...