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GCSE

How do you know when to use sin, cos and tan?

First draw the triangle and label all the information you have as well as the unknown angle or side length. There should be at least one angle labelled with some informtion - use this angle to label the o...

AW
Answered by Anna W. Maths tutor
106128 Views

Why do cells have receptors that allow viruses to invade?

Rather than cells having receptors specific to viruses, cells have receptors specific to molecules it needs to acquire from outside the cell, such as glucose (needed for respiration). It is the viruses wh...

ER
Answered by Emily R. Biology tutor
4623 Views

How do I analyse art?

When analysing art, you should first of all find out when the piece was created, who created it and what the piece was created using (for example, is it a painting? a sculpture or a photo?). After you hav...

JS
Answered by James S. Art tutor
2302 Views

How do I answer a 'Retrieve and Recall' question?

In a retrieve and recall question, you will need to first of all read the article you've been given, then you will need to find some key information that you think is important, and finally write around t...

JS
Answered by James S. English tutor
3505 Views

How do I remember which verbs take être in the perfect tense?

There are a selection of "verbs of movement" in French which use être as their auxiliary verb in the perfect tense instead of avoir. You can remember these using the mnemonic "MRS VAN DER T...

MM
Answered by Mary M. French tutor
6219 Views

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