If you earn $3200 per month and you expect your earnings to increase by 4% per year, how much do you think you will be making in 8 years?

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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.