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¿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
6071 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...
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Answered by Bryan P. • Maths tutor
5999 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 ...
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Answered by Bryan P. • Maths tutor
7710 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...
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Answered by Bryan P. • Maths tutor
6380 Views

How can I improve my German vocabulary?

First of all, don't worry if you're feeling overwhelmed by the amount of German vocabulary you need to know – sometimes it can feel like quite a lot, especially if you haven't been learning the language all ...
JM
Answered by James M. • German tutor
3516 Views