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
damaskus [11]
3 years ago
5

Evaluate cos^2 (n/12)

Mathematics
1 answer:
77julia77 [94]3 years ago
5 0

Answer:

[(2 + √3)/4] = 0.9330127

Step-by-step explanation:

We know that

cos (pi/12) ^ 2 =

cos (pi/12)* cos (pi/12)  =

[(√6 + √2)/4]*[(√6 + √2)/4] =

(0.9659)*(0.9659) = 0.9330127

[(2 + √3)/4] = 0.9330127

You might be interested in
HELP MEEEEEEEEEEEEEEEEEEEEE PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
kap26 [50]

<u>Part a</u>

Setting x=6, y=7.9(1.02)^6 \approx \boxed{8.9}

<u>Part b</u>

Setting x=14, y=7.9(1.02)^{14} \approx \boxed{10.4}

7 0
2 years ago
I need help plz plz plz plz plz plz plz plz plz plz
N76 [4]

Answer:

Variable: t

Constant: 18

Step-by-step explanation:

A constant is the number that is known, the variable is unknown. A variable is usually denoted with a letter and a constant  with digits. I hope this helps  :0)

6 0
3 years ago
An athletic club buys car magnets and pom-poms for club members. The car magnets cost 4.95 each, and pom-poms cost each. The ath
VLD [36.1K]

Answer:

Each car magnet costs $4.95 and each pom-pom costs $0.425

The club spent $495 on 100 car magnets and $85 on 200 pom-poms.

Step-by-step explanation:

I guess that we have to calculate the price of pom-poms and how much money was spent purchasing car magnets and pom-poms.

x + y = 300

2x = y (now we replace y)

x + 2x = 300

3x = 300

x = 100

The club purchased 100 car magnets and 200 pom-poms.

To determine the price of each pom-pom:

($4.95 x 100) + 200P = $580

$495 + 200P = $580

200P = $85

P = $0.425

6 0
3 years ago
Write an expression to represent 1 less than the quotient of four and a number X​
Daniel [21]

Answer:

x/4-1

Step-by-step explanation:

5 0
3 years ago
I need homework help! Its proportions, but the thing is, I'm terrible at them. All I know is that is/of=x/100.
masha68 [24]
19)  15/a = 3/2 

Start by cross multiplying....

3a = 30 

Divide both sides 3 

a = 10 

21)   2/7 = 4/d 

        2d = 28
       
        d= 14 

23)  8/p = 3/10

       
80 = 3p
         p = 26.66

25)  2 / -5 = 6/t
        2t = -30

      t = -15


7 0
3 years ago
Other questions:
  • A square room has an area of 130m². What is the length of one side?
    8·1 answer
  • I just kinda need help with that i don't know i don't wanna use my brain before i get on my xbox
    15·1 answer
  • HELP HELP !!!!!!!!!!!!!!!!!!!!!
    10·2 answers
  • Find the approximate circumstance of a circle with a diameter of 80 yards
    5·1 answer
  • An isosceles triangle has two sides of equal length. The third side is 5 less than twice the length of one of the other sides. I
    5·1 answer
  • PLEASE HELP FAST!!!!
    10·2 answers
  • The weight of corn chips dispensed into a 24-ounce bag by the dispensing machine has been identified as possessing a normal dist
    14·1 answer
  • Measure these angles.<br>a)<br>b)​
    12·2 answers
  • Hey can someone do this for me plz ASAP
    5·2 answers
  • Slope=5, goes through the point (2,7) what is the answer
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!