Rodrigo added 2 9 and 4 9 using these steps. 1. Check for common denominators. 2 9 and 4 9 2. Write the sum. 2 9 + 4 9 3. Add the numerators. 2 + 4 9 = 6 9

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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.

N- 3 is the answer