All categories

3 years ago

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

If g(x) = 3x - 4, what is the value of g-(g(-2))? 100 X + 4 3 10

kozerog [31]

-g(-2) is 10

Step-by-step explanation:

Step 1:

Given g(x) = 3x - 4. Find g(-2).

⇒ g(-2) = 3 × -2 - 4 = -6 - 4 = -10

Step 2:

Find -g(-2)

⇒ -g(-2) = -(-10) = 10

3 0

2 years ago

The proper way to write a single digit whole number in a sentence is:

Fynjy0 [20]

The correct answer for the given question above would be the last option. The proper way to write a single digit whole number if it is in a sentence should be SPELLED OUT and not written in numerals or roman numerals. For example, I have SIX apples; and not I have 6 apples.

6 0

3 years ago

A local hamburger shop sold a combined total of hamburgers and cheeseburgers on Thursday. There were fewer cheeseburgers sold th

myrzilka [38]

Answer:

the number of hamburgers sold on Thursday were 325.

Step-by-step explanation:

The total number of hamburger and cheese burger is missing

i will replace it with any figure, you can replace it wit your given data and you will get the solution.

A local hamburger shop sold a combined total of 593 hamburgers and cheeseburgers on Thursday

There were 57 fewer cheeseburgers sold than hamburgers

How many hamburgers were sold on thursday

Let h be the number of hamburgers and c be the number of cheeseburgers.

Using this information we can set up two equation as:

$h+c=593\\c=h-57$

Now we need to solve these two equations to get the value of number of hamburgers. For that we use substitution method as shown below:

$h+h-57=593\\2h-57=593\\2h=650\\h=325$

Therefore, the number of hamburgers sold on Thursday were 325.

6 0

3 years ago

Solve for x 3 = x/2 X =

enot [183]

Answer:

Step-by-step explanation:

3=x/2

Multiply both sides by 2

3 0

2 years ago

Given g(x) = - 4x + 4, find g(3). Answer:

likoan [24]

Answer:

-8

Step-by-step explanation:

substitute x with 3

-4(3) + 4

simplify (multiply)

-12+4

simplify

-8

4 0

2 years ago

Read 2 more answers