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What is the cosine rule and when can it be used?

The cosine rule is used to find the length of a side or size of an angle. Take a look at the triangle below: For this triangle we have sides a, b and c and angles A,B and C. For this triangle the cosine rule...
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Answered by Kulvinder L. • Maths tutor
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How do I solve a simultaneous equation?

You will be presented with two equations, both with two unknown values. For example: 8x-2y=19 and 3x=5+y To begin, we are going to move both unknown terms in the second equation to the same side: 3x-y=5 Then...
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Answered by Paul C. • Maths tutor
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If v = 10, a = 2 and t = 4, what is u

v = u+at u=v-at u=10 - (4*2) u=2
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Answered by Nicholas C. • Physics tutor
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How to write a well structured conclusion to a source question

It is important that all arguments from the individual sources are tied in at the end. As you will have cross referenced in the essay, this will make things much easier. Seperate the sources into those that ...
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Answered by Nicholas C. • History tutor
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What is the difference between a macrophage and a monocyte?

Macrophages are simply monocytes that reside in tissues, rather than blood. In histology, monocytes appear bean shaped, whereas macrophages are just large with fluffy edges.
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Answered by Alec S. • Biology tutor
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