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For any right-angled triangle, the square of the hypotenuse (the side opposite the right angle) is the sum of the square of the remaining two sides.
Adding (and subtracting) fractions is more difficult than multiplying them because we need to make sure that the denominators (bottom numbers) are equal in both fractions.
To do this, we may n...
The key to understanding expanding brackets is to understand that we need to multipy EVERYTHING in the first bracket by EVERYTHING in the second bracket.
We can think of the calculation
JLAnswered by Jennifer L. • Maths tutor4594 Views
The cosine rule is used to find the length of a side or size of an angle.
Take a look at the triangle below:
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