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How does Pythagoras Theorem work?

The Pythagoras Theorem only works with right-angled triangles. If you see a triangle other than right-angled triangles, then you do not need to apply the Pythagoras Theorem. The right-angled triangle has thr...
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Answered by Kamran H. • Maths tutor
8922 Views

What is the difference between ratios and fractions?

Both are different ways to represent an amount of something. Fractions show how much of a whole item there is for example 2/10 2 parts out of a total of 10. On the other hand, a ratio describes one amount re...
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Answered by Alice C. • Maths tutor
8018 Views

How do I know the best way to solve a quadratic equation?

There are loads of different ways to solve quadratics, and most of the time there isn't only one right way to solve them. there's three main ways that you can use to solve quadratics: factorisation, completi...
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Answered by Megan O. • Maths tutor
4756 Views

How do I solve the equation "2cos(x) = sin(2x), for 0 ≤ x ≤ 3π"?

The key to solving this equation is realizing that sin(2x) can be written in terms of sin(x) and cos(x) using a double-angle formula . (With trigonometric problems similar to this one, you should always chec...
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Answered by Sanveer R. • Maths tutor
34853 Views

A girl saves money over 200 weeks. She saves 5p in Week 1, 7p in Week 2, 9p in Week 3, and so on until Week 200. Her weekly savings form an arithmetic sequence. Find the amount she saves in Week 200. Calculate total savings over the 200 week period.

In part (a) the majority obtained 403 and some wrote their answer as £4.03, there was the usual crop of arithmetic errors with 2 ×199 = 298 or 498 being quite common. In part (b) the sum formula was usually ...
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Answered by Selena S. • Maths tutor
9205 Views