Find the 100th term in the arithmetic sequence -19,-14,-9,-4, a. 100 c. 476 b. 471 d. 481 select the best answer from the choices provided a b c d

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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.