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
pshichka [43]
3 years ago
14

How do I solve 2cos(x)=2sin(2x)

Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
4 0
2cosx=2sin2x. Sin2x is an identity for 2sinxcos. So 2[2sinxcosx] gives you 4sinxcosx. 2cosx=4sinxcosx. Divide 2cosx on both sides and gives you 2sinx=0 and divide again, sinx=0. Sinx is 0 at 0 and 360 degrees, or pi and 2pi. So thats what x would be. 0,360,pi,2pi.
You might be interested in
Janine inflated a ball to a radius of 18 cm and another ball to a radius of 12 cm.
Sladkaya [172]
Volume of a ball = (4/3)πr³

When r = 18cm, V = (4/3)×3.14×18³ =24416.64 cm³
When r = 12cm, V = (4/3)×3.14×12³ =7234.56 cm³
 Difference = 24416.64 - 7234.56 = 17182.08 cm³

the volume of air in the larger ball is <span>17182.08 cm³ greater than smaller ball </span>


3 0
3 years ago
Read 2 more answers
Which expression is equivalent to 1/4-3/4x?<br> 1/4(1+3x)<br> 1/4(1-3x)<br> 1/4(-1+3x)<br> 4(1+3x)
o-na [289]

Answer:1/4(1-3x)

Step-by-step explanation:

5 0
3 years ago
Help me help me help me help me ​
Nitella [24]

Answer:

1. 4/12, 3/9, 2/6, 5/15

2. 4/8, 8/16, 6/12

3. 2/8, 4/16, 3/12

4. 6/8, 9/12, 4/16

Step-by-step explanation:

I'm assuming your question is about all 4 problems shown so I'll explain how to solve all of them.

1. The question is asking you to find an equivalent fraction to 1/3. The easiest way to do this is to reduce all of the options given.

To reduce fractions, first determine if the numerator and denominator share any factors. If they do, divide both terms by the shared factors until you no longer get whole numbers.

Step 1: reduce answer choices

6/16 = 3/8 (done by dividing both terms by 2)

4/10 = 2/5 (divide both by 2)

3/8 = 3/8 (fully reduced)

2/5 = 2/5 (fully reduced)

4/12 = 1/3 (divide both by 4)

5/10 = 1/2 (divide both by 5)

1/2 = 1/2 (fully reduced)

3/9 = 1/3 (divide both by 3)

2/6 = 1/3 (divide both by 2)

5/15 = 1/3 (divide both by 5)

3/8 = 3/8 (fully reduced)

3/4 = 3/4 (fully reduced)

2. This question is solved the same way as question 1.

Step 1: reduce answer choices

2/5 = 2/5

6/9 = 2/3

4/8 = 1/2

3/9 = 1/3

8/16 = 1/2

8/10 = 4/5

7/12 = 7/12

6/12 = 1/2

3. This question is solved the same way as questions 1 and 2.

Step 1: reduce answer choices

3/8 = 3/8

2/8 = 1/4

4/9 = 4/9

2/7 = 2/7

4/16 = 1/4

10/14 = 5/7

6/9 = 2/3

3/12 = 1/4

4. This question is solved the same way as questions 1, 2, and 3.

Step 1: reduce answer choices

6/8 = 3/4

4/9 = 4/9

4/6 = 2/3

9/12 = 3/4

10/12 = 5/6

6/9 = 2/3

12/16 = 3/4

7/9 =7/9

7 0
2 years ago
Solve for the indicated variable in the literal equation ​
ANTONII [103]

Answer:

x = \frac{y}{3} - \frac{5}{3}

Step-by-step explanation:

Given

y = 5 + 3x

Required

Solve for x

Subtract 5 from both sides

y-5 = 5 -5+ 3x

y-5 = 3x

Divide through by 3

\frac{y}{3} - \frac{5}{3} = x

x = \frac{y}{3} - \frac{5}{3}

8 0
2 years ago
If x^3+y^3−12xy+64=0, what is the value of x+y?
jok3333 [9.3K]

Answer:

I don't know

Step-by-step explanation:

I don't really know but if you want help with math questions try this website called wolfram alpha. It's great

5 0
2 years ago
Other questions:
  • Simplify 3√-125n^12 A) -5n^9 B) -5n4 C) 5n4
    11·2 answers
  • If Jose makes 14 of his 20 free throws in a basketball game, what is his free throw shooting percentage? A) 20% B) 30% C) 70% D)
    5·2 answers
  • The graph of the function f(x) = 0.5|x| is than its parent graph, f(x) = |x|.
    10·1 answer
  • A climber on Mt Everest is 6000 meters from the start of his trail and at elevation 8000 meters above sea level. At x meters fro
    9·1 answer
  • 6. Ria purchased a car for
    7·1 answer
  • Help on math please.
    9·1 answer
  • A triangular prism has base edges 3 cm, 6 cm, and 7 cm long. Its lateral area is 464 cm^2. What is the height of the prism? Simp
    10·1 answer
  • Rewrite polynomial in standard form! Please help
    11·1 answer
  • Write 0.6222 repeating as a fraction <br> How many students would vote for Brianna
    13·1 answer
  • Help please I need 763.648 rounded to the
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!