What is 5/6 + 2/5 in its simplest form

In its simplest form it is 37/30 or 1 and 7/30.

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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.