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
andrew-mc [135]
3 years ago
5

Giải phương trình: sin*2x+sinxx.cox=1/2

Mathematics
1 answer:
creativ13 [48]3 years ago
6 0

Answer:

x = 9.47 degrees  ( in first quadrant.

Step-by-step explanation:

sin2x + sinx cos x = 1/2

Now sinx cos x = 1/2sin2x so:

3/2sin2x = 1/2

sin2x = 1/2 / 3/2

sin2x = 1/2 * 2/3 = 1/3

2x = arcsin 1/3 = 19.47 degrees

x = 9.74 degrees to nearest hundredth.

You might be interested in
Explain why the relationship is not linear.
zheka24 [161]
So, to be a linear relationship....the difference between the two consecutive "x" values and the difference between the two consecutive "y" values must be same.

In this case,
if we look at the x values , 4 - 3 = 1
                                          3 - 2 = 1
                                          2 - 1 = 1
they are all the same,
<u>BUT,</u><u><em /></u> if we look at the y values, 11.5 - 8.5 = 3
                                                   8.5 - 6.5 = 2
                                                   6.5 - 4.5 = 2
Here, the differences between the "y" values are all not the same.

<em><u>SO, the relationship is not linear.</u></em>
                                       
4 0
4 years ago
Need help on test <br> Angles and triangles 2
erma4kov [3.2K]
Alternate interior: <2 and <7
(They are on opposite sides of the transversal line, but inside the parallel lines.)

Corresponding: <1 and <3
(They have the same measure because they are in the same spot above the parallel line.)

Alt exterior: <1 and <8
(They are on opposite sides of the transversal, but on the outside of the parallel lines.)
6 0
3 years ago
I need help with this math problem.
DiKsa [7]

Answer:Multiply 410,000 with 26:)

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Max Steel drives his 1969 Mustang 15 miles per hour. If there are 5280 feet in one mile and 60 seconds in one minute, how many f
shutvik [7]

Answer:

22 feet per second

Step-by-step explanation

15x5280=79,200

79,200/60=1320 feet per minute since 60 minutes per hour

1320/60=22 feet per second since 60 seconds per minute

8 0
3 years ago
Roy buys a coat for $86.40, which includes an 8% sales tax. Which equation could you use to find the cost of the coat,c, without
IrinaVladis [17]

Answer:

The cost of coat without sales tax is $ 80 .  

Step-by-step explanation:

Given as :

The cost of coat with sales tax = $ 86.40

The rate of sales tax = 8 %

Let The cost of coat without sales tax = $ c

So, c + 8% of c = $ 86.40

Or, 1.08 of c = $ 86.40

Or, c = \frac{86.40}{1.08}

∴  c = $ 80

Hence The cost of coat without sales tax is $ 80 .   Answer

5 0
3 years ago
Other questions:
  • A national survey indicated that 50​% of adults conduct their banking online. It also found that 20​% are younger than​ 50, and
    9·1 answer
  • Please answer and explain.
    11·1 answer
  • This is another one yet do i not get? help!
    14·1 answer
  • 3n-2(n+8)=-8<br> please show work
    7·2 answers
  • What is the answer?​
    15·1 answer
  • PROBLEM 1A
    9·1 answer
  • Help, BRAINLIEST to CORRECT answer!
    15·2 answers
  • I need help please!!!
    13·1 answer
  • Elena went to a store where you can scoop your own popcorn and buy as much as you want. She
    5·1 answer
  • What is the area of this kite? A) 20 square meters
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!