CONCEPT PREVIEW Match each trigonometric function value or angle ...

Question

CONCEPT PREVIEW Match each trigonometric function value or angle in Column I with its appropriate approximation in Column II.

I                                  II.
1.                               A. 88.09084757°
2. cos⁻¹ 0.45              B. 63.25631605°
3.                               C. 1.909152433°
4.                               D. 17.45760312°
5.                               E. 0.2867453858
6.                               F. 1.962610506
7.                               G. 14.47751219°
8.                               H. 1.015426612
9.                                I. 1.051462224
10.                             J. 0.9925461516

Accepted Answer

Hello, everyone. We are asked to evaluate the following trigonometric expression using a calculator. We want to approximate the answer to three decimal places. We're given the arc cosine of 0.56. Our answer choices are a 124.056 degrees. B 55.944 degrees C 62.160 degrees D 0.976 degrees. First recall that since we are looking for an answer, that is a degree, we want to make sure that our calculator is in degree mode that will be important. Then you need to locate where the inverse of the cosine is. And once you do, we type in 0.56 and when I hit, enter, I get 55.94420226. And it looks like it does continue. Since we wanna round to three decimal places, we're gonna round this four looking to the right of it is a two. So that is less than five, we will not round up. So the arc cosine of 0. is 55.944 degrees. And that is answer choice B have a nice day.

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