Which of the following is equal to sin (11π)/3?

👨🏻‍🏫 學術台數學

[匿名]

2016-04-20 4:23 pm

A. sin (5π)/3
B. sin (2π)/3
C. sin (8π)/3
D. sin π/3

更新1:

PLEASE HELP

更新2:

Anyone? Please help I don't understand this question...

回答 (3)

[匿名]

2016-04-20 4:26 pm

✔ 最佳答案

A.
You need to simplify 11pie/3
One revolution on the unit circle is 2pie so you need to subtract 2pie from 11pie/3.
(11pie/3 -2pie)
(11pie/3- 6pie/3)
(5pie/3)

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用戶55769

2016-04-20 5:33 pm

sin (11π)/3
= sin (π)/3, sin(5π)/3, sin (8π)/3
Answer choice:
A. sin (5π)/3
C. sin (8π)/3
D. sin π/3

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用戶7639

2016-04-20 4:35 pm

http://oi66.tinypic.com/2j5b60m.jpg

參考: http://oi66.tinypic.com/2j5b60m.jpg

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