Kamil invests £9000 for 4 years. His investment pays compound interest of x% per annum (year).
At the end of the 4 years Kamil's investment is worth £11362.29
Work out the value of x
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since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.