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
schepotkina [342]
3 years ago
6

Find the exact value of cos(7pi/12) using half-angle identities. I'm still not sure how to solve this :( Any help is appreciated

!
Mathematics
2 answers:
Norma-Jean [14]3 years ago
7 0
Did you plug it into your calculator? That's a great place to start.
Anna007 [38]3 years ago
6 0

Answer:

I had no idea how to solve this on edge either. I ended up looking on you tube and found this guy named Larry. He did it step by step in a short video!!! I will put it down below so you can watch it if you need help.

Step-by-step explanation:

The answer is B.√2-√6 over 4

video name on you tube:

cos 7pi/12 find the exact value of the trig function

You might be interested in
Brian deposits $7000 into an account that pays simple interest at an annual rate of 3%. He does not make any more deposits. He m
Andre45 [30]

Answer:

A)1050

B)8050

Step-by-step explanation:

to find interest we use the formula A= P(1+rt) where P is the initial investment, r is the rate percent, and t is the time interval

for this question we have A=7000(1+3(5)) which gives 8,050 dollars which is the answer to part B

for part A we simply subtract the answer from B from the initial investment so 8050 - 7000 = 1050 made from interest

4 0
2 years ago
Use the function f(x) = 2x3 - 3x2 + 7 to complete the exercises.
leonid [27]

Answer:

Step-by-step explanation:

The value of the function f(x) at x=a can be determined by substituting a instead of x into the function expression.

1. When x=-1, then

f(-1)=2\cdot (-1)^3-3\cdot (-1)^2+7=-2-3+7=2.

2. When x=1, then

f(1)=2\cdot 1^3-3\cdot 1^2+7=2-3+7=6.

3. When x=2, then

f(-1)=2\cdot 2^3-3\cdot 2^2+7=16-12+7=11.

4 0
3 years ago
Read 2 more answers
Mike's age is five more than three times his sister's age. Mike is seventeen years old.
Agata [3.3K]
3x+5=17 that's the answer
7 0
4 years ago
Read 2 more answers
What does this mean
MissTica
That is basically splitting the sentence so that it’s easier for you to solve it. It’s basically the same thing
4 0
3 years ago
That picture is another question
erastovalidia [21]

Answer:

1. 3.82 miles

i dont have 2

3. 31

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • How does the graph of g(x)=x+5 compare with the graph of the parent funtion f(x)=x
    9·1 answer
  • Least common multiple 14 49
    13·2 answers
  • We are doing a study on shampoo buyers in Walmart stores across the US and we send them online surveys. Based on past studies, w
    15·2 answers
  • Is the following definition of supplementary reversible.if yes, write it as a true biconditional.
    15·1 answer
  • If you save three pennies on January 1, six pennies on January 2, nine pennies on January 3, and continue this pattern for one y
    8·2 answers
  • A number divided by four is 271. What is the number?
    7·2 answers
  • Write 3 equivalent fractions for 5/45
    9·2 answers
  • Which transformation gives the same result as a rotation of 180° around the origin
    14·2 answers
  • Please look for the question in the picture.
    11·1 answer
  • 6. Lisa was making $8.15 per hour at her after-school job. She receives a 20% raise.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!