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
12

Help please I don’t understand this problem

Mathematics
1 answer:
Molodets [167]3 years ago
8 0

Answer:

A

Step-by-step explanation:

We know that identity:

cos^2x+sin^2x=1.

From that we have:

cos^2x=1-sin^2x.

So it is:

cos^2x-sin^x=(1-sin^2x)-sin^2x=1-2sin^2x.

And this is A).

B) is not treu because cos^2 is not sin^2x+1

C) is not true because cos^2x-sin^x=1 is false.

D) is not treu because cos^2x is not sin^2x-1

You might be interested in
Which Of the following pairs of functions are inverse of each other?
damaskus [11]

One way is to solve for the inverse of the first function

remember, to solve, replace f(x) or g(x) with y, switch x and y, solve for y and replace it with f^{-1} (x)

A.

f(x)=x/2+8\\y=x/2+8\\x=y/2+8\\x-8=y/2

2x-16=y

f^{-1}=2x-16

nope, not A

<h3>What is the inverse function?</h3>

The inverse function of a function f is a function that undoes the operation of f. The inverse of f exists if and only if f is bijective, and if it exists, is denoted by {\displaystyle f^{-1}.}

B.

f(x)=3x^3+16\\y=3x^3+16x=3y^3+16\\x-16=3y^3\\(x-16)/3=y^3

f^{-1}(x)=\sqrt[3]{((x-16)/3)}

nope, not the same

not B

C.

f(x)=18/x-9\\y=18/x-9\\x=18/y-9\\x+9=18/y\\y(x+9)=18\\y=18/(x+9)\\f^{-1}(x)=18/(x+9)

The correct, answer is C.

To learn more about the inverse function visit:

brainly.com/question/2972832

#SPJ1

5 0
1 year ago
What is 243.875 rounded to the nearest tenth,hundreth,ten,and hundred?
ira [324]
Tenth: 243.9
hundreth: 243.88
ten: 240
hundred:200

hope this helps
5 0
3 years ago
Please help answer the following question
Elena L [17]

Answer:

D

Step-by-step explanation:

The unmarked angle of the triangle is also 40o. The triangle is marked with two equal sides (isosceles).

<2 + 40 + 40 = 180            Combine the left

<2 + 80 = 180                    Subtract 80 from both sides

<2 = 180 - 80

<2 = 100 degrees.

That's not the answer. We have to solve for x

<2 = x + 106

100 = x + 106       Subtract 106 from both sides

100 - 106 = x

x = - 6

8 0
2 years ago
Angle Sum Theorem. y = ?
salantis [7]

Answer:

90°

Step-by-step explanation:

Interior angles of ALL triangles sum to 180°

The whole large triangle has angles 60 60 60   ( they sum to 180)

that means x = 30

then the small triangle on the right has     60 + 30 + y = 180

  meaning y = 90 °

8 0
1 year ago
Find the midpoint 10 and 20
Ann [662]
The mid point is 15 because it is in the middle of 10 and 20
6 0
3 years ago
Read 2 more answers
Other questions:
  • Arrange the following units in order from smallest to greatest: centimeter, kilometer, meter, millimeter
    12·2 answers
  • How do i write equation using points (0,1) and (4,0)
    11·1 answer
  • 1,400 mm =How many<br> centimeters
    8·1 answer
  • Solve 7.8e^((x/3)ln(5))=14. What are the exact and approximate solutions?
    14·1 answer
  • 2x + 8y = 74<br> 3x - 4y = 43
    10·2 answers
  • Find the midpoint M of the line segment joining thee Point S =(6,-7) and I =(-8,3)​
    14·1 answer
  • PLS HELP WILL GIVE BRAINLIST
    12·1 answer
  • Circle X has a circumference of 44 cm and Circle Y has a radius of 14 cm. What is the
    9·1 answer
  • Does someone know this answer? Estimate the quotient by rounding the expression 432 ÷ 73 ≈ _____
    9·2 answers
  • A baseball player has a batting average of 0.250, which means he gets a hit 25% of the time he is at bat. If he bats 450 times d
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!