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I did a question the other day which expected me to know what cos(30) is without a calculator. How do I work it out?

There are certain angles that you can use shapes and trigonometry to work out what their cosine, sine and tangent angles are. These angles are 30, 45 and 60 degrees and there are 2 very simple but important ...
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Answered by Philip H. • Maths tutor
13646 Views

What is the difference between "tu" and "usted" in Spanish?

When speaking in Spanish, there are two way of saying "you" when you are talking to a single person - "tú " and "usted" . The difference between these two is that the first, &qu...
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Answered by Isabel C. • Spanish tutor
36281 Views

is x + x equal to x^2 ?

No. Think of an x as a tangible object, for instance an apple. If you have an apple plus another apple, you have 2 apples. Therefore if you have an x you have 1x. 1x plus another 1x is 2x, not x^2.
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Answered by Rosalie C. • Maths tutor
3880 Views

How do you calculate ratios? Example question: 'White paint costs £2.80 per litre, Blue paint costs £3.50 per litre, White paint and blue paint are mixed in the ratio 3:2. Work out the cost of 18 litres of the mixture [4 marks]' AQA Mathematics (8300)

Firstly, we need to calculate how much of the mixed paint is going to be white paint and how much is going to be blue paint. We can do this by looking at the ratio 3:2, if we add up the numbers in the ratio ...
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Answered by Zoe A. • Maths tutor
17830 Views

p^2 x p^2

p^7
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Answered by Tom S. • Maths tutor
4492 Views