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
Serggg [28]
3 years ago
5

If cos B = 3/5 , then what is the positive value of cos 1/2 B , in simplest radical form with a rational denominator?

Mathematics
1 answer:
ahrayia [7]3 years ago
5 0

Answer:

cos(B/2) = 2√5 / 5

Step-by-step explanation:

Use half angle formula:

cos²(B/2) = (1 + cos B) / 2

cos²(B/2) = (1 + 3/5) / 2

cos²(B/2) = (8/5) / 2

cos²(B/2) = 4/5

cos(B/2) = 2/√5

cos(B/2) = 2√5 / 5

You might be interested in
02
Marrrta [24]

Answer:

Susan is riding her bike. The distance she travels varies directly with the number of revolutions (turns) her wheels make. See the graph below.

23

20

8 0
2 years ago
What is 36:12 as a fraction in lowest terms?
Rom4ik [11]
Did you mean 36/12? If so the answer would be 3/1 or 3.
3 0
3 years ago
Estimate : 1) 48% of 8 2) 3% of 119 3) 26% of 32 4) 76% of 280
zaharov [31]
1) 48% of 8=3.84 
2) 3% of 119=3.57
3) 26% of 32=8.32
4) <span>76% of 280=212.8

Hope this helps ya!</span>
7 0
3 years ago
Need help ASAP , midterm<br> - 60 points
malfutka [58]
Your answer is going to be 5.2
5 0
2 years ago
Carter is going to use a computer at an internet cafe. The cafe charges an initial fee to
RoseWind [281]

Answer:

the additional charge per minute because t represents the number of minutes

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Paper and Pencil Construction: Construct a Line Perpendicular to a Given Line through a Point on the Line
    10·1 answer
  • The function g(x) = (x-2)^2. The function f(x)=g(x)+3
    11·2 answers
  • Solve the equation. 5x+8-3x=-10
    12·2 answers
  • What is the solution to the equation 4x-6=10x-3?<br> x=-2<br> x=-1/2 <br> x=1/2 <br> x=2
    5·2 answers
  • The weight of an adult blue whale is 9 × 104 kilograms; the weight of an elephant is 3 × 103 kilograms. How many times heavier i
    5·1 answer
  • $4 is what percent of $50 ? show work
    6·1 answer
  • One characteristic of all linear functions is that they change by
    12·2 answers
  • X 2 + 6x + 8 = 0 Final answer: x = x = ____
    5·1 answer
  • What is the area of the figure?
    11·1 answer
  • What number is one thousand less than one million?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!