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labwork [276]
3 years ago
6

Simplify (sinA +cosA) (sinA-cosA) ​

Mathematics
1 answer:
kvv77 [185]3 years ago
5 0

Answer:

-cos(2A)

Step-by-step explanation:

We know that (a+b) (a-b) = a^2-b^2

So it means we can simplify to sin^2(A)-cos^2(A) and we know cos^2(A) - sin^2(A) = cos(2A) but we will just multiply by -1 and we get - cos(2A)

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Explain in words how to graph the line from the equation.
Misha Larkins [42]

Answer:

you would find the y intercept and plot the y intercept first than find the slope and draw a line with the slope

Step-by-step explanation:

it depends on the equation, but this is the answer for a equation that is a line

6 0
3 years ago
Kinda spamming but I need a good grade and my brains not gonna pull through
Evgen [1.6K]

Answer:

d

Step-by-step explanation:

add all the angles you know to get 480

the number of angles - 2 x 180 to get 720

720-480=240

divide 240 by 3 to get x

4 0
3 years ago
2.(03.07)<br> Solve 2x^2 - 8x = -7. (2 points)
madam [21]

Answer:

Step-by-step explanation:

Make a quadratic:

2x^{2}-8x+7=0

Then use quadratic formula to solve.

It would be x=   2 ±   \frac{2}{\sqrt{2} }

6 0
3 years ago
Help!!!!!!!!!!!!!!!!
Andru [333]

Step-by-step explanation:

The area would be 9 times compared to the area of the original square. To test this, you can let the side of the original square be equal 1. By tripling this side, the side becomes three. Utilizing the area of a square formula, A= s^2, the area of the original square would be 1 after substituting 1 for s. Then, you do the same for the area of the tripled square. With the substitution, the area of the tripled square would be 9. This result displays the area of the tripled square being 9 times as large as the area of the original square. This pattern can be used for other measurements of the square such as:

let s = 2, Original Area= 2^2 = 4 Tripled Area= (2(3))^2 = 6^2= 36. 36/4 = 9

let s = 3, Original Area = 3^2 = 9 Tripled Area - (3(3))^2 = 9^2 =81. 81/9 = 9

let s = 4, Original Area = 4^2 = 16 Tripled Area - (4(3))^2 = 12^2 = 144. 144/16 = 9

let s = 5, Original Area = 5^2 = 25 Tripled Area - (5(3))^2 = 15^2 = 225. 225/25 = 9

let s = 6, Original Area = 6^2 = 36 Tripled Area - (6(3))^2 = 18^2 = 324. 324/36 = 9

let s = 7, Original Area = 7^2 = 49 Tripled Area - (7(3))^2 = 21^2 = 2,401. 2,401/49 = 9

You can continue to increase the length of the square and follow this pattern and it will be consistent.

7 0
3 years ago
Read 2 more answers
Consider the following model:
SSSSS [86.1K]

Answer:

a. 3

Step-by-step explanation:

An independent variable is the variable that is changed in an experiment to test its effects on the dependent variable. i.e. inputs

A dependent variable is the variable being tested, measured or predicted in an experiment. I.e a outcome

In this case, the the effects of the amount tutors are paid a week before exam, the amount of sleep before exam and the number of study hours are input variables to determine or predict a students score in exam

The independent variables are;

x1 =represents the amount paid to a tutor (in dollars) in the week before the exam

x2 = represents the number of hours of sleep in the week before the exam

x3 = number of study hours in the week before the exam

The dependent variable is the exam score

B0, B1, B2,B3, B4 are coefficients

8 0
4 years ago
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