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
Ad libitum [116K]
3 years ago
14

For an angle 0 with the point (-20,-21) on its terminating side, what is the value of cosine ?

Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
5 0

check the picture below.


\bf (\stackrel{a}{-20},\stackrel{b}{-21})\impliedby \textit{let's find the \underline{hypotenuse}} \\\\\\ \textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies c=\sqrt{a^2+b^2} \qquad \begin{cases} c=hypotenuse\\ a=\stackrel{adjacent}{-20}\\ b=\stackrel{opposite}{-21}\\ \end{cases} \\\\\\ c=\sqrt{(-20)^2+(-21)^2}\implies c=\sqrt{841}\implies c=29 \\\\[-0.35em] ~\dotfill\\\\ ~\hfill cos(\theta )=\cfrac{\stackrel{adjacent}{-20}}{\stackrel{hypotenuse}{29}}~\hfill

You might be interested in
A yard is 3 times as long as it is wide. 176 feet of fencing is needed to enclose the yard. Find the dimensions of the yard
svet-max [94.6K]
The perimeter of a rectangle is twice the sum of its side lengths.

P=2(L+W), we are told that L=3W and P=176 so

2(3W+W)=176

2(4W)=176

8W=176

W=22 ft, since L=3W

L=66 ft

So the yard is 22 feet wide and 66 feet long.


5 0
3 years ago
Read 2 more answers
Use compatible numbers to estimate 5 × 1,021
leonid [27]

Answer:

the correct answer is D

Step-by-step explanation:

5 x 1,021 = 5,105

6 0
2 years ago
Please solve find perimeter
babunello [35]

Answer:

12???

Step-by-step explanation:

5 0
3 years ago
If CE=7 in. and AC=19 in., AE=
e-lub [12.9K]

Answer:

26

Step-by-step explanation:

5 0
3 years ago
Whats 2400000 as a standard form
frosja888 [35]

Answer:

2 400 000

Step-by-step explanation:

is that right? not sure wut u were looking for

3 0
3 years ago
Other questions:
  • Is a triangle whose side measure 12 ft, 16 ft and 20 ft a right triangle?
    14·1 answer
  • Macy eats 33 animal crackers as a snack every day after school. How many animal crackers does she eat
    8·2 answers
  • Which is a good comparison of the estimated sum and the actual sum of 7 9/12 + 2 11/12
    15·2 answers
  • What is the result when the number 64 is decreased by 4.1%? Round your answer to the nearest tenth.
    13·2 answers
  • Can someone answer this question please answer it correctly if it’s corect I will mark you brainliest
    15·1 answer
  • A company manufactures and sells novelty mugs.The manufacturing costs consists of a fixed cost of R8 000 and a variable cost of
    10·1 answer
  • What term does perpendicular lines use
    6·1 answer
  • To pay for the trailer, the company took out a loan that requires Amazon Rafting to pay the bank a special payment of $8,700 in
    14·1 answer
  • Write an equivalent expression in simplest form. 3+2(5x)-7
    9·1 answer
  • Find the value of x such that the data set has given mean is 110<br><br><br> 102,121,104,112,110,x
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!