Use a calculator to evaluate sec(pi/7). Round your answer to 2 decimal places. Use π=3.14159?
回答 (4)
2016-06-22 9:56 pm
✔ 最佳答案
sec(π/7)= 1 / [cos(π/7)]
= 1 / [cos(3.14159/7)
= 1.11 (to 2 decimal places)
2016-06-22 9:56 pm
sec(3.14159/7) ≈ 1/cos(0.448799) ≈ 1/0.900969 ≈ 1.11
2016-06-22 9:53 pm
Well,
sec(pi/7) # 1,11
hope it' ll help !!
sec(pi/7) # 1,11
hope it' ll help !!
2016-06-22 9:52 pm
1.11
收錄日期: 2021-04-18 15:11:12
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https://hk.answers.yahoo.com/question/index?qid=20160622135002AAu6px7