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
Firlakuza [10]
3 years ago
5

XVerify the identity. (7 points) cos 4u = cos22u - sin22u

Mathematics
1 answer:
Alexandra [31]3 years ago
5 0

Answer:

cos 4u = co^s2 2u - sin^2 2u

Step-by-step explanation:

cos 4u = co^s2 2u - sin^2 2u

Let 4u = 2x

cos 2x = cos^2 x - sin^ 2 x

cos (x+x) = cos^2 x - sin^ 2 x

Using cos(x+y) = cos(x)cos(y) -sin(x)sin(y)

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

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

Since this is true

cos 2x = cos^2 x - sin^ 2 x

This is true

Substituting 4u back for 2x

cos 4u = co^s2 2u - sin^2 2u

This is true

You might be interested in
2/3,2/6,2/8 fractions in order from greatest to least
Pani-rosa [81]
2/3,2/6,2/8
23 is the greatest because it has larger pieces
2/6 is the second greatest because it is a little smaller than thirds
2/8 is the least because it has the smallest pieces
5 0
3 years ago
Find the perimeter.Simplify your answer.
Alchen [17]

Answer:

22w - 18

Step-by-step explanation:

To find the perimeter we have to add up all the sides

10w-10+w+1+10w-10+w+1

combine light terms

22w - 18 would be our answer

3 0
2 years ago
Read 2 more answers
At a popular Italian restaurant chain, a bowl of spaghetti without tomato sauce contains 400 kilocalories. A standard serving si
MariettaO [177]

Answer:

The answer is 3.6 servings per meal.

Step-by-step explanation:

Each meal of spaghetti has 400 kcal. We can get the amount of servings just simply dividing the meal by the standar serving size:

Servings= \frac{400 Kcal}{1 meal} \frac{1serving}{110Kcal} =3.6 \frac{servings}{meal}

5 0
3 years ago
What is the solution to the equation represented by the model below?
cricket20 [7]
What is the model. Because I cannot do anything without a model...
4 0
2 years ago
Read 2 more answers
How do I solve this ?
igomit [66]

Answer:

16

Step-by-step explanation:

because it's g of 7 use the third equation.

(7+1)(7-5) = 8x2 = 16

3 0
2 years ago
Other questions:
  • The product of the slopes of two non-vertical perpendicular lines is always -1. It is NOT possible for two perpendicular lines t
    12·2 answers
  • Simplify 10:11 as a ratio
    14·2 answers
  • PLEASEEE ITS DUEEE TODAYYY
    8·2 answers
  • Question 1. The sticker price of a picture frame is $10 and the sales tax is 10%. What is the total price of the picture frame?
    10·1 answer
  • Solve (y/4) +3 = 7<br><br> A:<br> y = 40<br> B:<br> y = 1<br> C:<br> y = 25<br> D:<br> y = 16
    12·2 answers
  • Ms. McClain conducted an experiment with a 6-sided number cube. The table shows the number of times each number landed:
    12·2 answers
  • Write in Standard Form: <br><br> 2a^2 = a - 2
    6·1 answer
  • What is the solution to this system of equations?
    11·2 answers
  • How do I graph this linear function <br> x &lt; -1
    6·2 answers
  • 50 divided by 6 with a remandier
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!