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
ira [324]
3 years ago
15

Which expression is equivalent to sin(1.8x) sin(0.5x)?

Mathematics
1 answer:
Rasek [7]3 years ago
3 0
Hum, this problem was difficult. You use the next expression to solve this problem. \[\cos (A - B) = \cos A \cos B + \sin A \sin B \] \[\cos (A + B) = \cos A \cos B - \sin A \sin B\] \[\cos (A - B ) - \cos (A +B ) =2 \sin A \sin B\] So \[\sin A \sin B = 0.5 \left( \cos(A - B) - \cos(A + B) \right)\] A = 1.8 x, B = 0.5 x \[\sin (1.8x) \sin (0.5x) = 0.5\left( \cos(1.8-0.5)x - \cos(1.8+0.5)x \right)\]\[= 0.5 \left( \cos(1.3x) - \cos (2.3x) \right)\] It's finish !!
You might be interested in
I'm giving 30 points if you answer correctly!
soldi70 [24.7K]

Answer:

Part A: 64 (right-side 3th cell) and 7 (left-side 4th cell)

Part B: 5 hours- $45; 6 hours- $54; 8 hours- $72

Part C: $5 more

Step-by-step explanation:

Explanation for Part C- We know that if she works 5 hours mowing lawns, she will earn $40. But, when she works at the theme park we use the ratio given to find out how much she earn per hour. In her case she earns $9 for every hour she works at the theme park. now if you multiply that by 5 we can find out how much she earns in 5 hours which is $45. This is $5 more than what she earns mowing lawns for the same amount of time. Here we can conclude that Barbara earns $5 dollars more working at the theme park for 5 hours rather that mowing lawns.

If you can please name me the brainliest that would be much appreciated. Thanks and Good Luck!

 

4 0
3 years ago
Which of the following equations is equivalent to x - y = 5?
Masja [62]

Answer:

6x-6y=30

Step-by-step explanation:

<u><em>The complete options are</em></u>

a) x - 2y = 30

b) 4x - 3y = 30

c) 3x - 4y = 30

d) 6x - 6y = 30

The given equation is

x-y=5

<u>Verify option d</u>

we have

6x-6y=30

Divide by 6 both sides

(6x-6y)/6=30/6

\frac{6x}{6}-\frac{6y}{6}=\frac{30}{6}

x-y=5

therefore

x-y=5  and 6x-6y=30 are equivalent

3 0
3 years ago
Which of the following is not a proportion?
Alina [70]
4/10 = 12/20 since 4/10 = 10/20
5 0
3 years ago
Read 2 more answers
3(x-6) + 4 + 5x - 6<br><br> (use distributive property)<br><br> please help asap!
Dmitry_Shevchenko [17]

Answer:

8x - 20

Step-by-step explanation:

3(x - 6) + 4 + 5x - 6         \longmapsto       Distribute 3 to (x - 6)

3(x) - 3(6) + 4 + 5x - 6

3x - 18 + 4 + 5x - 6

Simplify:

3x + 5x - 18 + 4 - 6

8x -18 - 2

8x - 20

-Chetan K

3 0
3 years ago
Read 2 more answers
1/3(9x+16+2) + 2x What is X
Flauer [41]
This is the answer if your question

3 0
3 years ago
Other questions:
  • Answers to 6,7,8 pleaseee?
    5·1 answer
  • Plz plz help me with this
    8·1 answer
  • How is 0.025 written as a fraction for in simplest form/enter your answer in the box
    7·2 answers
  • Plz help its due Tomorrow
    13·2 answers
  • Glenn needs to cut pieces of ribbon that are each 1 meter long to make ribbon key chains. If he has 7 pieces of ribbon that are
    5·2 answers
  • Evaluate 2(4-1)^2 please help
    11·2 answers
  • 25 is what percent of 365
    10·2 answers
  • How many milliliters are equal to 4.593 liters?
    6·2 answers
  • An online clothing store had 450,082 visitors in May, 450,566 visitors in June, and 405,987 visitors in July. What is the order
    12·1 answer
  • Determine if an exponential would be an appropriate model for the data shown in each scatter plot. Select
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!