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
HELP ME GRAPH THIS<br> (slope problem )
hichkok12 [17]

Answer:

y = -5x - 19

Explanation:

y = mx +b

-4 = -5(-3) + b

-4 = 15 + b

-19 = b

y = -5x - 19

4 0
4 years ago
Please help with 5.<br> Thank you!
tatyana61 [14]
Make all the x points opposite. For example -837 to +837
7 0
3 years ago
Please can someone help me answer these questions? Would be really grateful if it was done by the 12th of January. Thank you :)
FrozenT [24]
1. 4g= 37-5
 ⇒ 4g= 32
⇒ g= 32/4
⇒ g= 8

2. c= 5*6
⇒ c= 30

3. f+4= 3*5
⇒f+4= 15
⇒ f= 15-4
⇒ f= 11.

4. b+6= 30/5
⇒ b+6= 6
⇒ b= 6-6
⇒ b=0

5. a-5= 60/5
⇒ a-5= 12
⇒ a= 12+5
⇒ a= 17

6. e+2= 45/5
⇒ e+2= 9
⇒ e= 9-2
⇒ e= 7

7. d-5= 12/3
⇒ d-5= 4
⇒ d= 4+5
⇒ d= 9

8. m-4= 16/4
⇒ m-4= 4
⇒ m= 4+4
⇒ m= 8

9. q+6= 30/5
⇒ q+6= 6
⇒ q= 6-6
⇒ q= 0

10. h/3= 3+5
⇒ h/3= 8
⇒ h= 8*3
⇒ h= 24

11. 3c= 3-5
⇒ 3c= -2
⇒ c= -2/3

12. x/3= 6-7
⇒ x/3= -1
⇒ x= -1*3
⇒ x= -3

13. 6p= 2+1
⇒ 6p= 3
⇒ p= 3/6
⇒ p= 1/2

14. 2d-7= 27/3
⇒ 2d-7= 9
⇒ 2d= 9+7
⇒ 2d= 16
⇒ d= 16/2
⇒ d=8

15. b-3= 5/2
⇒ b-3= 2.5
⇒ b= 2.5+3
⇒ b= 5.5

16. y-1= 1/3
⇒ y= 1/3+1
⇒ y= 1 1/3

17. 5v= 9-3
⇒ 5v= 6
⇒ v= 6/5
⇒ v= 1.2

18. n-3 = 3*6
⇒ n-3= 18
⇒ n= 18+3
⇒ n= 21

19. t+10= 1*4
⇒ t+10= 4
⇒ t= 4-10
⇒ t= -6

20. 3c+4= 3*5
⇒ 3c+4= 15
⇒ 3c= 15-4
⇒ 3c= 11
⇒ c= 11/3
⇒ c= 3 2/3

Hope this helps~
6 0
4 years ago
Read 2 more answers
Please evaluate the equation​
snow_lady [41]

Step-by-step explanation:

=  \sum \limits_{n  = 1}^{7} ( - 2. {6}^{n - 1} )

=  \sum \limits_ {n = 1}^{n_{ \text{max}}} (a_1. {r}^{n - 1} )

\:

a_1 =  - 2

n = 7

r = 6 \to r  >1

\:

• Find S7.

s_n =  a_1.( \frac{ {r}^{n}  - 1}{r - n} )

s_7 =  - 2.( \frac{ {6}^{7} - 1 }{6 - 1} )

s_7 =  - 2.( \frac{279.936 - 1}{5} )

s_7 =  - 2.( \frac{279.935}{5} )

s_7 =  - 2 \: . \: 55.987

s_7 =  - 111.974

The answer is B.

8 0
2 years ago
Given the area of a square is 255 square feet, what length is each side?
Keith_Richards [23]
Hey You!

255 / 4 = 63.75

Each side would be 63.75 square ft.
3 0
3 years ago
Other questions:
  • During a bike challenge, riders have collect various colored ribbons. Each 1/2 mile they collect a red ribbon, each 1/8 mile the
    7·1 answer
  • Katy finished 1/3 of her bag of Halloween candy in 3 days.How many days would it take for her to finish the entire bag of candy?
    14·1 answer
  • I need help with number 8 and 9 someone please help ASAP
    6·1 answer
  • Jonny has 12 paper clips. Each paperclip Is 3/4 of an inch long. If we were to link them all together to make a long chain of pa
    13·1 answer
  • Whats the smaller angle ?
    6·1 answer
  • Makayla takes home $4400 per month from her job as a physical therapist. if her only debt obligations are a car loan payment of
    8·2 answers
  • Find the measure of an interior angle and exterior angle of a regular 24gon
    14·1 answer
  • What is the answer to<br> -6n + 5 &lt; 11
    7·1 answer
  • Number 15 please<br> logarithms <br> algebra two
    11·1 answer
  • Which of these inequalities is graphed below
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!