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
Temka [501]
3 years ago
7

Can anyone please help : show that cos^{2} (θ)= 1 + cos(2θ) / 2 , using the compound angle formula

Mathematics
1 answer:
iragen [17]3 years ago
6 0

Answer:

Below

Step-by-step explanation:

Let's prove that cos^2(O) = 1+ cos(2O)/2

We khow that cos(2O) = 2 cos^2-1

● cos(2O) = 2 cos^2-1

Add one to both sides:

● cos(2O) +1 = 2 cos^2-1+1

● cos(2O) +1 = 2 cos ^2

Divide both sides by 2

● [cos(2O)+1]/2 = cos^2

You might be interested in
A square tile measures 12 inches by 12 inches. Each unit on a coordinate grid represents 1 inch. (1,1) and (1,13) are two of the
klio [65]
The two other points would be (13,1) and (13,13) because the square tile is 12 inches on each side.
4 0
2 years ago
Read 2 more answers
Which function is a shrink of the exponential growth function shown on the graph?
fgiga [73]
The exponential function shown in the graph is 3^x, so (1/2)3^x is a shrink of it.

Selection B is appropriate.
3 0
3 years ago
Read 2 more answers
As an estimation we are told 5 miles is 8 km. <br> Convert 27.4 miles to km.
kicyunya [14]

Answer:

43.8 km to the nearest tenth.

Step-by-step explanation:

5 miles is 8 km

so 1 mile = 8/5 km

and 27.4 miles = 27.4 * 8/5

= 43.84 km

7 0
3 years ago
Read 2 more answers
Please choose the answer that describes the scientific notation for 5,098,000.
avanturin [10]
Scientific notation is the representation of a number in a power of ten, with a sequence of digits placing the comma after the first digit, and the power or then that is mathematically consistent with the number. For example 400 is 4.00 * 10^2; 3100 is 3.100 * 10^4; 13421 = 1.3421 * 10 ^4. It is important that you have only one digit before the comma. So, 5,098,00 is 5.098 * 1,000,00 = 5.098 * 10^6. <span>The answer is the option c. 5.098 * 10^6.</span>
8 0
3 years ago
Tom puts a cup of tea in his microwave oven He knows that the final temperature of the water will be a function of the number of
bearhunter [10]
B and C are both correct 

t(s) is equivalent to the temperature of the tea after s amount of seconds
4 0
3 years ago
Other questions:
  • What is 2 + 2(3+4) - (4-1) x (5+6)
    14·2 answers
  • HELP; The life spans of 10 adult mayflies have a mean of 4 hours and a MAD of 2 hours. Fill in the table below with possible val
    13·1 answer
  • Simplify (3n - 2m)^2 = Can someone break this down for me? I don't understand why I'm having issues with this.
    7·2 answers
  • Compelte the solution of the equation find the value of y when x equals 2<br> -7x+2y=4
    10·1 answer
  • You need 368cm of tape for a project, how many decimeters is this?
    14·2 answers
  • Pls help :(
    6·1 answer
  • 23 + 62 ÷ 9 what is the anwser
    9·1 answer
  • Solve linear system of equations graphically - y=3/5x+2<br> y=x-6
    9·2 answers
  • A carpet cleaning company charges $6 per hour with a flat $10 service charge.
    6·1 answer
  • I do have examples to help me but they make no sense :/
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!