3 years ago

What are the solutions to cos 2x = - 1

Mathematics

1 answer:

N76 [4]3 years ago

4 0

Answer:

X can be - 1/2 or 0.5

2x0.5=-1

Step-by-step explanation:

You might be interested in

<img src="https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%20%285x%20-%209%20%29%20%3D%202%20%28%5Cfrac%7B1%7D%7B3%7D%20%2B%206%20%

Tatiana [17]

Answer: 103/15

Step-by-step explanation:

We can simplify the right-hand side to be $2 \left(\frac{1}{3}+6 \right)=2 \left(\frac{19}{3} \right)=\frac{38}{3}$ .

This means we need to solve:

$\frac{1}{2}(5x-9)=\frac{38}{3}\\5x-9=\frac{76}{3}\\5x=\frac{103}{3}\\x=\boxed{\frac{103}{15}}$

7 0

2 years ago

Liam is making chocolate chip cookies. The recipe calls for 1 cup of sugar for every 3 cups of flour. Liam only has 2 cups of fl

HACTEHA [7]

Answer:

2/3 cups of sugar

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Solve the linear equation <br> 5x-10y=-5

IceJOKER [234]

ANSWER WITH STEPS:

Let's solve for x.

5x−10y=−5

Step 1: Add 10y to both sides.

5x−10y+10y=−5+10y

5x=10y−5

Step 2: Divide both sides by 5.

10y−5

x=2y−1

6 0

3 years ago

Sharon wants to make key chains with different colored beads. Each key chain will look the same. Sharon will use a total of 20 g

skelet666 [1.2K]

20 green and 20 red ?

8 0

3 years ago

Read 2 more answers

What is 17/7 as a whole number?

deff fn [24]

17/7 cannot be put into a whole number, but it can be put into decimal form. The estimated decimal number is 2.43. You just divide 17 by 7 and then round.

3 0

4 years ago

Read 2 more answers

What are the solutions to cos 2x = - 1​

What are the solutions to cos 2x = - 1