Search over 10,000 free study notes

The preterite tense indicates a single, completed action in the past. The imperfect indicates a continuous action in the past, a repeated action or a description.
Let's take the verb 'comer', to eat,...

Starting from the left hand side we can substitute the sin and cos sum and difference formulas. These are sin(A+B) = sinAcosB + cosAsinBand cos(A+B) = cosAcosB - sinAsinBBecause x = A = B when substituted...

Primary alcohol is the only alcohol which can fully oxidise as it first oxidises to an aldehyde and this can be further oxidised to a carboxylic acid. This is not possible with 2⁰ alcohols as t...

First we should try and factorise the polynomial the brackets will be (x+?) and (x-?) as the coefficient of x and the -21 have differing signs.just thinking of the factors of 21 we can see that 7-3 = 4 th...

Literature is brilliant to write about because it is so subjective. There usually isn't a correct answer. Of course, you have to know the basic definition of a symbol, but other than that, most anything c...