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kiruha [24]
3 years ago
9

Rewrite 2 cos 75° sin 75° using a double-angle identity.

Mathematics
1 answer:
ANEK [815]3 years ago
4 0

Answer:

sin(150) or 1/2

Step-by-step explanation:

Using the double angle identity of sin2x = 2sinxcosx, you can determine the value of x and rewrite the function; 2sin(75)cos(75) = sin(2(75)) = sin(150) = 1/2

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egoroff_w [7]
Can i get brainliest if my answer is true hehehehe :p

8 0
3 years ago
The graph of a linear equation has a slope of -2 and passes through point (-4, 3 ) what is the equation of the line
Irina-Kira [14]

Answer:

(-4,3)=x1,y1

m=-2

we have

y-y1=m(x-x1)

y-3=-2(x+4)

y-3=2x+8

2x-y+11=0 is the eqn

4 0
3 years ago
A family has two cars. During one particular week, the first car consumed 20 gallons of gas and the second consumed 15 gallons o
OleMash [197]

Answer: the fuel efficiency of the first car is 20 miles per gallon.

the fuel efficiency of the second car is 15 miles per gallon.

Step-by-step explanation:

Let x represent the number of miles per gallon of the first car.

Let y represent the number of miles per gallon of the second car.

During one particular week, the first car consumed 20 gallons of gas and the second consumed 15 gallons of gas. The two cars drove a combined total of 625 miles. It means that

20x + 15y = 625- - - - - - - - - - 1

The sum of their fuel efficiencies was 35 miles per gallon. It means that

x + y = 35

Substituting x = 35 - y into equation 1, it becomes

20(35 - y) + 15y = 625

700 - 20y + 15y = 625

- 20y + 15y = 625 - 700

- 5y = - 75

y = - 75/ - 5

y = 15

x = 35 - y = 35 - 15

x = 20

4 0
3 years ago
picture included , please help, which of the following equations describe the line shown below (1,10) and (-3,2) *check all that
rosijanka [135]
Slope is\text{m}=\frac{y_1-y_2}{x_1-x_2}=\cfrac{10-2}{1-(-3)}
Then you use the equation
\text{y=mx+b}
Where b is the y-intercept. To find it, plug in x and y from one of the points. Say, point 1 (1,10):
10=m(1)+b
You know m (from above) and now you can solve for b.

Rearrange terms:
y-b=mx

And that will be the answer.

Make sense?
4 0
4 years ago
Read 2 more answers
Select the correct answer
Alecsey [184]

Answer:

1/25x

Step-by-step explanation:

3 0
3 years ago
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