In problems 13 through 18, find each acute angle (?) using a scientific calculator. Express the answer in degrees with two decimal places only. 13. cos ? = 0.4917 14. sen ? = 0.0859 15. ? = tan?¹ 8.031 16. ? = cos?¹ 0.5097 17. sen ? = 0.6031 18. tan ? = 1.993
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4917, we find θ by taking the inverse cosine of 0.4917. Show more…
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