![champton79](/avatars/22265.jpg)
champton79
21.10.2019 •
Mathematics
Find cos(1680°) and sin(1680°). identify the measure of the reference angle.
Solved
Show answers
More tips
- H Health and Medicine What to Take with You to the Maternity Hospital?...
- F Family and Home How to Choose the Perfect Air Conditioner for Your Life...
- H Health and Medicine Discover the Hidden Principles and Real Results of the Japanese Diet...
- H Health and Medicine Understanding Pregnancy Tests: What You Need to Know?...
- H Health and Medicine What Makes a Man a Man?...
- C Computers and Internet How to Get Rid of Spam in ICQ?...
- A Art and Culture Who Said The Less We Love a Woman, the More She Likes Us ?...
- F Family and Home How to Get Rid of Your Neighbors?...
- S Society and Politics How Could Nobody Know About the Dead Mountaineers?...
- H Health and Medicine How to Cure Adenoids?...
Answers on questions: Mathematics
- M Mathematics A tank is draining water such that the volume is given with an exponentially decreasing graph as shown in the graph below. If the volume was modeled with an equation...
- M Mathematics Most states in the United States are divided into counties. Some counties are very large, while some are very small. Different states have different numbers of counties....
- M Mathematics Which makes the proportion true? AB/?= EF/GH...
- M Mathematics What theorem did we prove using similar right triangles....
- M Mathematics Please help im so confused and need helpppp to solve for x....
- M Mathematics Akira and Hideo are twins with different jobs. Akira earns five-eighths of what Hideo earns, but Akira’s expenses are half of Hideo’s. Akira ends up saving 40% of...
- M Mathematics Tim runs 2.3 miles in 11.2 minutes. If he runs 98 minutes, about how many miles will he run?...
- M Mathematics What is the answer to 4(x + 3) 7x - 3x - 11...
- M Mathematics The output level of machinery, electricity and oil of a small country are 3,000, 5000 and 2,000 respectively each unit of machinery require input of 0.3 unit of...
- M Mathematics In a lab, 100 cells are present at the beginning of an experiment. During the first 10 hours, the number of cells increased by 28% each hour....
Ответ:
Reference angle will be![60^{\circ}](/tpl/images/0338/9187/d1e5f.png)
Step-by-step explanation:
We have given![cos(1680^{\circ})](/tpl/images/0338/9187/3aedb.png)
It can be written as![cos(1680^{\circ})=cos(8\pi +240)](/tpl/images/0338/9187/c239b.png)
As 240° is lie in the third quadrant
And we know that for third quadrant
Reference angle is given by![angle-180^{\circ}](/tpl/images/0338/9187/dc34c.png)
So reference angle will be![240^{\circ}-180^{\circ}=60^{\circ}](/tpl/images/0338/9187/d9566.png)
Now![cos(1640)=cos(9\pi +60)=-cos60=\frac{-1}{2}](/tpl/images/0338/9187/a2dde.png)
Ответ:
jftcx