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What is the difference between RAM & ROM and the ways they are used within a computer system?

In a computer system, RAM is used to temporarily hold programs & data while they are required by the CPU. Storing them in RAM, due to its rapid access times and close proximity to the CPU, means its c...

Answered by Sam P. • Computing tutor

2692 Views

Using z=cos(θ)+isin(θ), find expressions for z^n-1/z^n and z^n+1/z^n

We make use of De Moivre's Theorem which states that (cos(θ)+isin(θ))^n=cos(nθ)+isin(nθ).z^n-1/z^n=cos(nθ)+ isin(nθ)-cos(-nθ)- isin(-nθ)=cos(nθ)+ isin(nθ)-cos(nθ)+ isin(nθ) (by trig relat...

Answered by Bogosi S. • Further Mathematics tutor

4180 Views

Explain 2 Advantages of Using Die Casting over Sand casting for the manufacturing of a Metal Engine Block.

Options: (1 mark for 1 Advantage, 1 mark for 1 Explanation)Die casting has a better surface finish (1 mark). This Allows for a reduction of additional processes needed to finish the product which can make...

Answered by Ben S. • Design & Technology tutor

1409 Views

Prove that 2Sec(x)Cot(x) is identical to 2Cosec(x)

2 Secx = 2/CosxCotx = 1/Tan x = Cosx/SinxTherefore: 2SecCotx = 2/Cosx * Cosx/Sinx = 2/Sinx = 2Cosecx

Answered by Ben S. • Maths tutor

3772 Views

How should I write my answer to "Why do you want to study medicine?"

There is no need to rehearse a whole answer, and typically interviewers are not a fan of this anyway, since it is often obvious when an answer sounds recited. So just collect your thoughts on your main po...

Answered by Molly A. • Medical School Preparation tutor

1329 Views