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
Katena32 [7]
3 years ago
7

if cos a = 1/3 then the positive value of tan 1/2a is? i did radical 2/3 over 4/3, but im not sure what to do now.

Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
6 0
Hello,

tg( \frac{a}{2} )=\pm \sqrt{ \dfrac{1-cos(a)}{1+cos(a)} } \\
=\pm \sqrt{ \dfrac{ \dfrac{2}{3} }{ \dfrac{4}{3} } } =\pm \sqrt{ \dfrac{1}{2} } =\pm \dfrac{ \sqrt{2} }{2} \\

+\ if\  \dfrac{a}{2}\  in\ 1\ quadrant\ (or \ 3)}\\

-\ if\  \dfrac{a}{2}\  in\ 2\ quadrant\ (or \ 4)}\\

You might be interested in
Jordan flipped a coin 492 times. Which of the following would be a good estimate of the number of times the coin landed on heads
Irina-Kira [14]
I'd say B. but that's only because I divided the number of times he flipped the coin by the number of sides it has, 2, and came up with 246. The closest number on here to that is 231 or B. I hope I helped.
6 0
3 years ago
Read 2 more answers
I shared 3 cars with my cousins I have 5 cousins and me. I want to know how many people will be in each car
tatuchka [14]

there will be 2 people in each car

5 0
3 years ago
Find the quotient...<br><br> 3/11 divided by 9/13<br><br> Simplify your answer...
Korvikt [17]
3/11 divided by 9/13 = 3/11 multiplied by 13/9 = 39/99=13/33
5 0
3 years ago
Read 2 more answers
What is the solution of the equation 3^5 sqrt (x+2)^3+3=27?
BlackZzzverrR [31]
3^5) (x + 2)^(3/2) + 3 = 27 
<span>(x + 2)^(3/2) = 24 / 243 </span>
<span>x + 2 = [ 24 / 243 ]^(2/3) </span>
<span>x + 2 = [ 8 / 81 ]^(2/3) </span>
<span>x = [ 4 / 81^(2/3) ] - 2 =-1.786

the answer is x=-1.786</span>
4 0
3 years ago
Read 2 more answers
What is universal gravitational constant
koban [17]

Answer:

6.67408 × 10^-11 m^3 kg^-1 s^-2

Step-by-step explanation:

F = G M 1 M 2 d 2 , where F is the gravitational force between two point masses, M1 and M2; d is the distance between M1 and M2; G is the universal gravitational constant, usually taken as 6.670 × 1011 m3/(kg)(s2) or 6.670 × 10−8 in centimeter–gram–second units. a = F M 1 = G M 2 r 2 .

8 0
3 years ago
Other questions:
  • 7 plus -2 times 3 square
    6·1 answer
  • Using the image, determine the length of each arc.<br> m RC=<br> m CBR =
    5·1 answer
  • You need at least $535 to go on a trip to California. You have already save $200. You decide to save an additional $25 per week.
    11·2 answers
  • What is 3 1/2 x 4 4/8?
    12·2 answers
  • On a driving test, Roxane answered 70% of the 20 questions correctly. How many questions did
    15·2 answers
  • The diagram below shows the dimensions of two identical rectangular prisms joined together. What is the combined volume of the t
    5·1 answer
  • 10. Which of the following sets is written in order from least to greatest?
    11·1 answer
  • You can perform 4 push-ups in 24 seconds. Write an equation that represents the relationship between time x and the number of pu
    8·1 answer
  • Consider the functions f(x) and g(x) shown below. For which of the following values of x does f(x) does not equal g(x)?
    14·1 answer
  • Slope of -7 and y -intercept of 1
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!