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R cos(x − α)=(R cos α) cosx + (R sin α) sinx . So, if we want to write an expression of the form a cosx + bsin x in the form R cos(x − α) we can do this by ...
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You will find calculations much easier if you can recognise in numbers their composition as powers of simple numbers such as 2 , 3, 4 and 5 . Once you have got ...
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Any number, apart from zero, when raised to the power zero is equal to 1. 6 . The fifth rule. Let's have a look now at doing a division again. Consider a3 ...
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From the Figure we can deduce that we have been given 2 sides and the included angle . We can use the cosine formula to deduce the length of side a. a2. = b2 + ...
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Sigma notation is a method used to write out a long sum in a concise way. In this unit we look at ways of using sigma notation, and establish some useful ...
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Sigma notation is a method used to write out a long sum in a concise way. In this unit we look at ways of using sigma notation, and establish some useful ...
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By inspection of the denominator we see that the component parts must have denominators of x − 3 and 2x + 1 so we can write. 3x + 5 . (x − 3)(2x + 1 ). = A x − 3.