1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
asambeis [7]
3 years ago
6

Solve the equation 2 cos x + 1 = 0 , 0 <= x <= 2pi PLEASE HELP! WILL AWARD!

Mathematics
2 answers:
Keith_Richards [23]3 years ago
6 0
It would be pi over 6, 5 pi over 6, and 3 pi over 6.
OleMash [197]3 years ago
3 0
Im not saying its right but I got <span>0,<span><span>2π</span>3</span>,<span><span>4π</span>3</span>,and2π  </span><span><span>f<span>(x)</span></span>=2<span><span>cos2</span>x</span>−<span>cosx</span>−1=0</span>
Solve this quadratic equation for cos x.
Since a + b + c = 0, use shortcut.
One real root is cos x = 1 and the other is <span><span>cosx</span>=<span>ca</span>=−<span>12</span></span>.
Trig table and unit circle -->
a. cos x = 1 --> arc x = 0, and arc <span>x=2π</span>
b. <span><span>cosx</span>=−<span>12</span></span> --> arc <span>x=±<span><span>2π</span>3</span></span>
The arc <span><span>−2π</span>3</span> is co-terminal to the arc: <span><span>4π</span>3</span>
Answers for <span><span>(0,2π)</span>:</span>
<span>0,<span><span>2π</span>3</span>,<span><span>4π</span>3</span>,and2<span>π</span></span>
You might be interested in
When information is applicable and useful for the task at hand, it is considered to be
Nataly_w [17]

The information will be "relevant" when it is the application or user. A further explanation is below.

  • The knowledge to address an inherent issue could be successfully applied, is considered as a piece of Relevant information.
  • This is indeed a special difficulty whenever selecting the size as well as the composition of financial accounts of such an organization, as users' judgments on a likely path may be adjusted by a suitable design and degree of depth of such helpful material.

Thus the above solution is right.

Learn more:

brainly.com/question/6835548

4 0
3 years ago
I need the answer it has to be right
Alex777 [14]

Answer:

0.5divided by 3 is the answer

Step-by-step explanation:

6 0
3 years ago
There was 3,905 more hits on the school's website in January than February.February had 9,854 hits how many hits did the school'
seropon [69]
13,759 hits for both months

4 0
3 years ago
Read 2 more answers
Ow many solutions does the equation 5m − 5m − 12 = 14 − 2 have?
storchak [24]
Zero because -12 does not equal 12
3 0
3 years ago
Read 2 more answers
If tñ=2ñ+3, find S10​
Allisa [31]

Answer:

S_{10}=280

Step-by-step explanation:

Given that,

t_n=2n+3 ...(1)

We need to find the value of S_{10}.

Put n = 1 to find the first term.

t_1=2(1)+3=5

Put n = 2 to find the second term.

t_2=2(2)+3=7

Put n = 3 to find the third term.

t_3=2(3)+3=9

Put n = 10 to find the tenth term.

t_{10}=2(10)+3=23

It means we need to find the sum of 5,7,9,.....,23.

The formula for the sum of n terms is given by :

S_=\dfrac{n}{2}(a+a_n)

We have, n = 10, a = 5 and a_n=23

So,

S=\dfrac{10}{2}(5+23)\\\\S_{10}=10\times 28\\\\=280

So, the value of S_{10} is equal to 280.

3 0
3 years ago
Other questions:
  • A cone shaped paper cup is 2.5 inches high and has a diameter of 3 inches. Ehat is volume to the nearest hundredth
    5·1 answer
  • NEED ASAP. PLEASE HELP ME.
    7·1 answer
  • Please I need the correct answer please
    10·1 answer
  • Find the area : 15in 44in 18in 22in<br><br>a 165in²<br>b 495in²<br>c 330in²<br>d 594in²
    14·1 answer
  • Tamela feeds her finches 1 cup of food for every three birds in the cage. She writes
    8·1 answer
  • 26 over 99 in lowest terms
    5·1 answer
  • Given a tangle with lines of 7 m and wet or 5 m,what would be the permeter
    13·1 answer
  • To make a bakery's signature chocolate muffins
    7·1 answer
  • Find the missing side length, m.
    9·1 answer
  • Question 8 of 20If f(x) = 2x²+2 and g(x)=x2-1, find (f- g)(x).O A.3x²+3O B.x2²+1 O C.3x2² +1O D.x² +3
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!