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
Afina-wow [57]
3 years ago
13

Use the product-to-sum identities to rewrite the following expression as a sum or difference.

Mathematics
1 answer:
PtichkaEL [24]3 years ago
3 0
Answer:

= cos4x

Explanation:

cosAcosB = [cos(A-B)+cos(A+B)]

Given: 2cos(2x)cos(2x)

= 2[cos(2x-2x)+cos(2x+2x)]

= 2cos4x^2
You might be interested in
Find the value of x and y in the parallelogram below.
Delicious77 [7]
In a parallelogram, the opposite angles are equal and the sum of the angles is 360 degrees.

W = Z and Y = X
3y = 3x
Y = X = y
3y + y + 3x + x = 360
3x + x + 3x + x = 360
8x = 360
x = 360/8 = 45

Therefore, x = 45; y = 45
7 0
3 years ago
A student needs 3/4 pounds of modeling clay for a project. If each package has 1/8 pounds of clay how many packages of clay does
Maurinko [17]

Answer:

6 packages

Step-by-step explanation:

Since the student needs a total of 3/4 pounds of modeling clay we need to calculate how much is 3/4 of 8 since that is the denominator being used to calculate each individual package of clay. Since 3/4 is equal to 0.75 we can simply multiply this by 8 to calculate the total amount of clay needed.

8 * 0.75 = 6

This means that the student will need 6/8 pounds of clay. Since each package brings 1/8 pounds this means that we would need a total of 6 packages in order to have enough clay.

4 0
2 years ago
HHHHHHHHHEEEEEEEEEELLLLLLLLLLPPPPPPPPP ILL FAIL MY CLASSSSSSSSSSSSSS
Serhud [2]

Answer:

I think the answer is {10,20,30} but please check it

6 0
3 years ago
Read 2 more answers
Factor completely. x^3 - y^3
finlep [7]
(x-y)(x^2+xy+y^2)

The first parentheses contain the cubed root of both the terms so x and y respectively. second parentheses follows the formula (a^2 + ab + b^2)
x corresponds to a and y corresponds to b. The signs are what change depending on what the original equation is. Since the original is a subtraction then the signs are -/+/+. you can remember it using the acronym SOAP. (S = same, O = opposite, AP = always positive) So the first sign is x - y (same as subtraction from original), the second and third are x^2 + xy + y^2 (opposite is a plus, and the last sign is always a positive.
8 0
3 years ago
A dealer offers a computer software program whose list price is $500 at a 19% discount. She will give an extra 3% discount if pa
Mekhanik [1.2K]

Answer:the selling price if payment is made in cash is $395

Step-by-step explanation:

The list price of the computer software program is $500

A dealer offers the computer software program at a 19% discount.

She will give an extra 3% discount if paid in cash. This means that the total discount in percentage if a customer paid in cash would be

19 + 3 = 21%

The value of the discount would be

21/100 × 500 = 0.21 × 500 = $105

Therefore, the selling price if payment is made in cash would be

500 - 105 = $395

3 0
3 years ago
Other questions:
  • Sean answered 1820 quiz questions correctly wire percent of the quiz questions did Sean answer correctly?
    9·2 answers
  • Divide 59 divided by 2550
    14·2 answers
  • Can you simplify -3(x - 2y)
    15·1 answer
  • Will give extra points and brainliest !! /:
    10·2 answers
  • When Pascal built a dog house he Knew he wanted the floor of the house To have an area of 24 square feet.what is the Dimension o
    15·2 answers
  • Geometry and I need help
    9·2 answers
  • Ok last question then im done
    15·2 answers
  • A jar has 6 red marbles and 4 blue marbles. If 2 marbles are chosen, one at a time without replacement, what is the probability
    8·1 answer
  • Bus X travels 224 miles in 4 hours. Write the equation of the line that describes the relationship between distance y and time x
    7·1 answer
  • Write ACUTE, RIGHT, OBTUSE, STRAIGHT or REFLEX for each of the following: ( 5 marks)
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!