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
Marina86 [1]
2 years ago
6

Who know the answer to this

Mathematics
1 answer:
Slav-nsk [51]2 years ago
8 0
B bbbbbbbbbbbbbbbbbb
You might be interested in
4 groups of 5 hundredths
Fudgin [204]
5/100 * 4 = 20/100 reduces to 1/5
4 0
3 years ago
Prove the identity.
Delvig [45]

Answer:

D. Pythagorean

Step-by-step explanation:

Given the identity

cos²x - sin²x = 2 cos²x - 1.

To show that the identity is true, we need to show that the left hand side is equal to right hand side or vice versa.

Starting from the left hand side

cos²x - sin²x ... 1

According to Pythagoras theorem, we know that x²+y² = r² in a right angled triangle. Coverting this to polar form, we have:

x = rcostheta

y = rsintheta

Substituting into the Pythagoras firnuka we have

(rcostheta)²+(rsintheta)² = r²

r²cos²theta+r²sin²theta = r²

r²(cos²theta+sin²theta) = r²

(cos²theta+sin²theta) = 1

sin²theta = 1 - cos²theta

sin²x = 1-cos²x ... 2

Substituting equation 2 into 1 we have;

= cos²x-(1-cos²x)

= cos²x-1+cos²x

= 2cos²x-1 (RHS)

This shows that cos²x -sin²x = 2cos²x-1 with the aid of PYTHAGORAS THEOREM

5 0
3 years ago
Find the value of x.<br> A.70<br> B.54<br> C.40<br> D.74
Nuetrik [128]

Answer:

a is the value of X

Step-by-step explanation:

8 0
2 years ago
In ΔUVW, the measure of ∠W=90°, the measure of ∠V=71°, and VW = 55 feet. Find the length of UV to the nearest tenth of a foot.
Katarina [22]

Answer:

168.9 feet

Step-by-step explanation:

7 0
2 years ago
Alaska has 1,700,000 square kilometers. Flordia has a landarea one tenth the size of Alaska. What is the landarea of Florid
Scrat [10]
The land area of Florida is 170 000 square kilometres, this is because 1 700 000 divided by 10 is 170 000. 
8 0
3 years ago
Other questions:
  • The time T that technician requires to perform preventive maintenance on an air conditioning unit has an unknown probability dis
    5·1 answer
  • Town planners are designing a new park. Use the picture to find the area of the park.
    7·2 answers
  • Eric can mow the Johnson’s lawn in 2 hours. It takes him 5 hours to mow the Smith’s lawn. If he is paid $9 per hour , how much w
    9·1 answer
  • A student model the relationship in the table with the equation x = 4y. Explain the student's error. Write and equation that cor
    15·1 answer
  • At 8:00 am, it is 10 degrees outside. 12 hours later at 8:00 pm, it is -20 degrees outside. What is the difference in temperatur
    14·1 answer
  • Suppose that the probabilities of a customer purchasing​ 0, 1, or 2 books at a book store are 0.20.2​, 0.20.2​, and 0.60.6​, res
    15·1 answer
  • Find the derivative of the following function
    12·1 answer
  • Substitute the given values into the given formula and solve for the unknown variable. If necessary, round to one decimal place
    11·1 answer
  • What is the initial value of the exponential function shown on the graph?
    11·2 answers
  • -9y + 8(4z + 3y) -6x <br><br><br> PLZ HELP
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!