Compare 5/4 and 9/10. describe two methods you could use to compare the fractions

1.You can convert them so that they have equal denominators. Then, the numerator can help you decide.
2. Convert them into decimals and compare.
3. Sketching out the fraction that represents wholes and parts.

Here, the numerator of 5/4 was larger than the denominator, unlike 9/10. Subsequently, you can infer that 5/4>9/10

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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.