GCSE Mathematics: Number

(2) [Total 5 marks] Prove that, (n + 1)2 – (n – 1)2. is a multiple of 4, for all positive integer values of n. (3) GCSE Mathematics: SOH CAH TOA Trigonometry. Grade Criteria Can Do To get a grade C you must be able to: Use sine, cosine and tangent to find angles one of the shorter sides in right-angles triangles. To get a grade B you must ... ................
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