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How is trigonometry used on non-right angled triangles?

To do this, there are two rules, the Sine Rule and The Cosine Rule. The sine rule is a/Sin A = b/Sin B = c/Sin C. (the lower and uppercase are very important. The rule also stands if you write the entire thi...
BC
Answered by Bobbie C. • Maths tutor
119356 Views

Factorise and solve x^2 - 8x + 15 = 0.

The easiest way to solve this problems it via trial and error. For any quatdratic (a x 2 + bx + C = 0) , the coeficcent of x, (in this case b = 8) is the sum(+) of the two solutions and c is the product( ). ...
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Answered by Dominic M. • Maths tutor
5801 Views

How do you find the area between two lines?

First, find the x coordinates of where the lines intersect by setting the equations of the lines equal to each other. Then solve the quadratic (or polynomial) equation. Next, integrate both lines individuall...
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Answered by Rory P. • Maths tutor
12500 Views

You are given a square which you are told has a total area of 100 squared centimetres. You are also told that one side of the square has dimension 4(3x + 2), and the other has dimension 8x - y. What are the values of x and y?

The first thing to know is that a square has equal sides, and that the area of a square is length x length. Therefore in this case Length x length = 100 or Length 2 = 100 ans so Length = square root of 100 =...
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Answered by Hannah A. • Maths tutor
5419 Views

how do you solve these simultaneous equations?

6x + y = 8 (1) 4x - y = 12 (2) Method 1 elimination: -Adding/subtracting the two equations together to eliminate one of the unknowns (1) + (2) 6x + y = 8 + 4x - y = 12 10x = 20 (/10) x= 2 sub 'x=2' into (2) ...
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Answered by Shriya G. • Maths tutor
5874 Views