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solve z^4=2(1+isqrt(3)) giving roots in form r(cos(theta)+isin(theta))

Sorry but it's a little hard to write the question out! I have the working on paper but I can't upload it. Ok so first you need to multiply out the brackets to make it a little easeier to look at and obtain ...
RL
Answered by Robert L. • Maths tutor
6754 Views

¿Cuándo se utiliza el pretérito perfecto, el imperfecto y el pretérito? = When do you use the perfect, the imperfect and the indicative past?

Firstly, let's start with the 'imperfecto' tense as it's the easiest to differentiate. The endings for this tense are as follows: For regular verbs ending -AR in the infinitive (that is the 'to ...', e.g. to...
AM
Answered by Alya M. • Spanish tutor
5934 Views

Solve for 0=<x<360 : 2((tanx)^2) + ((secx)^2) = 1

First step I would take would make it look less intimidating by converting all components into sin and cos i.e 2(((sinx)/(cosx))^2) + 1/((cosx)^2) = 1 Notice that there is a common denominator of cosx^2 so I...
BP
Answered by Bryan P. • Maths tutor
5896 Views

Find the exact solution to: ln(x) + ln(7) = ln(21)

Log rules: log(a) + log(b) = log(ab) so, in this case, we must find x such that 7x = 21 thus x = 3 similarly, log(a) - log(b) = log(a/b) rearranging the original equation we get: ln(x) = ln(21) - ln(7) so x ...
BP
Answered by Bryan P. • Maths tutor
7612 Views

Write sqrt(50) in the form Asqrt(50) where A is an integer

Note that sqrt(ab)=sqrt(a)sqrt(b) Thus to have A, an integer, we must find the highest number 'a' that is a square number and is also a factor of 50. So, a=25 and b=2 (ab=25x2=50) and we have: sqrt(50) = sqr...
BP
Answered by Bryan P. • Maths tutor
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