Two numbers are in a ratio of 7: 4. their sum is 220 find the bigger number

7 : 4 ⇒ 7x : 4x

7x + 4x = 220
11x = 220    |divide both sides by 11
x = 20

7x = 7 · 20 = 140

The bigger number is 140.

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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.