Select the correct product.
(a + 8)(b + 3)

(a+8)(b+3)

= a*b + 3*a + 8*b+ 8*3

= ab+ 3a + 8b + 24

The product of (a+8)(b+3 ) is   ab+ 3a + 8b + 24

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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.