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z = -2 + (2root3)i. Find the modulus and argument of z.

The first step to answering this question is to pinpoint exactly what it means. We remind ourselves that when we are given a number in the form of a + bi, we are dealing with a complex number . A complex num...
MS
12879 Views

How do you decide what the sign of the enthalpy change should be?

You have to think about whether or not energy is being released by the system into the surroundings (exothermic), or whether the system is taking energy up from the surroundings (endothermic).You have to put...
BW
Answered by Ben W. • Chemistry tutor
2651 Views

How do I compare unseen poetry with that of my anthology?

My first piece of advice would be to read through the poems once and focus on the overall message that the poet is trying to convey and then think what poem in your anthology presents a similar overall messa...
AS
5612 Views

Use integration by parts to find the integral of x sin(3x)

Firstly we remind ourselves of the integration by parts formula. The formula used to integrate u dv/dx with respect to x = uv - the integral of v du/dx with respect to x. So the first thing we have to decide...
MS
Answered by Marnie S. • Maths tutor
17603 Views

If I am given a line, how do I find a line that is parallel to it? What about perpendicular?

The key fact here is to remember the relationship between the gradients of lines which are parallel and perpendicular. Two lines that are parallel will always have the same gradient. So if we have a line y =...
HW
Answered by Harry W. • Maths tutor
4817 Views