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
Irina-Kira [14]
3 years ago
12

Sin 20.sin 10 as sum or difference

Mathematics
1 answer:
Zielflug [23.3K]3 years ago
6 0

Answer:

see explanation

Step-by-step explanation:

The difference identity for the product is

sinxsiny = \frac{1}{2} [ cos(x - y) - cos(x + y) ], thus

sin20sin10

= \frac{1}{2} [ cos(20 - 10) - cos(20 + 10) ]

= \frac{1}{2} ( cos10 - cos30 )

You might be interested in
GE = 3x + 12 and GH = 72. Find the value of x.
Furkat [3]

Answer: x=20

Step-by-step explanation:

5 0
3 years ago
a city’s average temperature over five months is shown in the graph. which statement is not true of the data
mrs_skeptik [129]

Answer: March to April shows the least increase of average temperature.

5 0
3 years ago
Sum of three consecutive multiples of 6 is 648. One of these multiple is​
Ber [7]

Answer:

Let two consecutive multiples of 3 be x and (x+3)

A/q,

x * (x+3) = 648

➡ x² + 3x = 648

➡ x² + 3x -648 = 0

➡ x² + 27x - 24x -648 = 0

➡ x ( x + 27 ) -24 ( x +27)

➡ ( x - 24) ( x + 27)

➡ x = 24 and x = -27

so, we take x = 24.

Required multiples of 3

➡ x = 24

➡ x +3 = 24+3 = 27.

3 0
3 years ago
Read 2 more answers
Graph y= 2/3x-4<br><br> How do I graph this?
umka21 [38]

Answer:

Read below !!

Step-by-step explanation:

Since you are already given the full equation, you would just follow the steps of plotting a line! I start usually by plotting the y-intercept, which is always on the y-axis. In this case, that would be -4 ! You mark -4 on the line, and from there, you would use RISE/RUN to find out the slope of the line. Since it's 2/3, you would rise 2, and go to the right 3, all from the point -4. You should do that about two times in order to get your line !!

I hope this helps !!

6 0
2 years ago
3 pounds cost $15. How many pounds can you buy for $45?
morpeh [17]

Answer:

you can buy 9 poundssss

6 0
3 years ago
Read 2 more answers
Other questions:
  • A boat travels 2km upstream and 2km downstream. The total time of the trip is 1 hour. The speed of the stream is 2km/h. What is
    6·1 answer
  • One leg in a right triangle is 11 ​m, and the hypotenuse measures 11√2 m. Find the length of the other leg.
    12·1 answer
  • Students heights in inches were obtained as part of a study and a frequency distribution was constructed with the first class ha
    14·1 answer
  • I need help with this
    6·2 answers
  • If an interior angle of a regular polygon measures 144° how many sides does the polygon have
    13·1 answer
  • Do you know what is 0.11 x 0.91
    15·2 answers
  • Solve for y.<br> x+y=7<br> x=4<br> Simplify your answer as much as possible.
    7·2 answers
  • Directions: Simplify the following monomials (if possible).
    9·1 answer
  • Which is not a rational number <br>0.77777...<br>11/13 <br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B19%7D%20" id="TexFormu
    8·2 answers
  • Please help I need thiss done right noww
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!