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What is a vector and how do I calculate the 'modulus' of a vector?

A vector is something that has both magnitude and direction . An example of a vector is velocity because it has magnitude and direction. However, speed is not a vector. This is because it only has magnitude....
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Answered by Anya S. • Maths tutor
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cosx=cos60° what's X between 0 and 360

x=300 because when you draw a y=cos x graph the cos 60 is on the decreasing part of the curve just before 90 degrees crossing zero. Then at 270 its increasing again and its 30 degrees more.
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Answered by Omar B. • Maths tutor
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Integrate cos^2x + cosx + sin^2x + 3 with respect to x

Step 1: simplify the question using the law cos 2 x + sin 2 x = 1 /// Step 2: add the numbers /// Step 3: integrate cosx (remember the differentiation/integration circle sin --> cos --> -sin --> -co...
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Answered by Amanda B. • Maths tutor
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15 machines work at the same rate, 15 machines can complete an order in 8 hours, however 3 of the machines break down after 6 hours. The other machines continue until the order is complete. In total how many hours does EACH machine work? (3 mark question)

When tackling wordy questions such as this the first thing to do is to convert the question into an equation where possible. in this case 15M(Machines) x 8H(Hours)=120MH (Machine Hours). This initial equatio...
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Answered by Omar A. • Maths tutor
12704 Views

a) Factorise: 2x^2-72, and hence b) find the y-intercept of the line with the equation: y=(2x^2-72)/(4x-24)

a) Take out the common factor, giving: 2(x 2 -36), idenitfy the difference of two squares and factoise accordingly, giving: 2(x-6)(x+6) b) you have the facotirse version of the top of the fraction from part ...
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Answered by Innis S. • Maths tutor
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