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
julsineya [31]
2 years ago
14

A,b,c or d please help i don’t understand this

Mathematics
1 answer:
alexira [117]2 years ago
7 0

uhm the answer is D. sorry if am wrong

You might be interested in
PLEASE HELP! 8 POINTS!! Find the value
Pepsi [2]

Answer:

-sqrt(3)/2

Step-by-step explanation:

Use double angle identity for sin(2x)

sin(2x)=2sin(x)cos(x)

We are given sin(x)=-1/2 so we already have so far that:

sin(2x)=2(-1/2)cos(x)

sin(2x)=-1*cos(x)

We just need to find cos(x).  

x is in the fourth quadrant so cosine will be positive there

knowing the unit circle we should know that if sin(x)=-1/2 then cos(x)=sqrt(3)/2 while in 4th quadrant.

So the answer is sin(2x)=-1*sqrt(3)/2=-sqrt(3)/2

5 0
3 years ago
What is a possible value of sin(theta) when cos2(theta)=0.21
podryga [215]
We know that

cos²(theta)=0.21
sin²(theta)+cos²<span>(theta)=1
</span>sin²(theta)=1-cos²(theta)------> sin²(theta)=1-(0.21)-----> 0.79
 sin(theta)=√0.79
 sin(theta)=0.89

the answer is
the value of  sin(theta) is 0.89

6 0
3 years ago
Olivia selects marbles from a bag containing 5 red and 7 blue marbles. Which of the following events are independent?
nikklg [1K]

Answer:

B

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Which of the following are examples of irrational numbers? select all that apply.​
Klio2033 [76]

Answer:

The second one because 5 is not a perfect square root.  The third one because 24 is not a perfect square. Also the last one. Their all irrational because you don't know what is coming next.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Do u know 12 time 13<br><br> Answer is 144
vovangra [49]

Answer:

12 x13 = 156

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Simplified form the eaquation
    14·1 answer
  • The graph shows the amount of money paid when purchasing bags of peanuts at the zoo:
    10·2 answers
  • The line has the same slope as 7x-y=5 and the same y intercept as the graph 3y-11x=15
    10·2 answers
  • Does 4 divided by 3 = 3/4?
    14·1 answer
  • Please help asap pleaseeee (picture shown)
    9·1 answer
  • A jetski rental company charges a $50 deposit, plus $25 per hour to rent a jetski. This can be represented by the formula T = 25
    7·1 answer
  • The Happy-Go-Lucky Beach was 163 feet long from parking lot to high tide. After last year's hurricane came ashore, the beach onl
    10·1 answer
  • What does negative 2 over 3 &gt; −1 indicate about the positions of negative 2 over 3 and −1 on the number line?
    9·2 answers
  • • There are 20 pounds of the mixture.
    7·1 answer
  • What's the word called for when people don't believe in ghosts or any type of things , there was a specific word !
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!