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Choosing whether to use sin, cos or tan is what will gain you the majority of marks for a trig question. Firstly, you should label the three sides of the triangle as hypothenuse, adjacent and opposite. In...

When we complete the square, we're looking for an equation that looks like (x-a)² + (y-b)² = r², where (a,b) is the centre and r is the radius. When we expand brackets usi...

3-1=2 2X2 = 4 2-1= 1 =3x^2- 4x

Vol = 1/3 pi r^2 h

r = 2n

h = 3n

Therefore

Vol = 1/3.pi.(2n)^2.3n

Vol = 1/3.pi.12n^3

Vol = 4.pi.n^3

The function f(x) is a product of 2 functions of x, so when we differentiate it, we need to use the product rule.

The product rule states that for a function f(x) = g(x)*h(x), f'(x) is given by g(x...