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How do I use Pythagorus' Theorum?

Pythagorus' Theorum is used to calculate the lengths of the sides of a right angled triange, and is written mathematically as follows:

a² + b² = c²

Answered by Narissa P. • Maths tutor

6906 Views

What can I say about the roots of a quadratic equation without actually calculating them?

If a quadratic equation is of the form ax²+bx+c, calculate D (Discriminant) whose value is b²-4ac.

If the value of D is negative, the equation has imaginary roots.<...

Answered by Swapnil S. • Maths tutor

4857 Views

How can I integrate e^x sinx?

Such an integral looks difficult to manage; clearly it is a case of integration by parts, but neither part of the product appears to reduce easily into a nicer form.

The key here is use t...

Answered by Alex W. • Maths tutor

6510 Views

When do you use 'n choose k' and where does the formula come from?

When do you use n choose k?

Say you have n objects/elements, and each one can either be selected or not selected. ‘n choose k’ gives yo...

Answered by Tom B. • Maths tutor

20844 Views

Find the mean, median, mode and range of this data: 2, 5,6,12,5

To find the mean you must add all of the numbers together (2+5+6+12+5) and divide by how many numbers you have in your data set (5). Mean = 30 : 5 = 6

To find the median you must f...

Answered by Jonathan T. • Maths tutor

10787 Views