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
Delicious77 [7]
1 year ago
11

Cos 90 - 2sin45 + 2tan180

Mathematics
1 answer:
riadik2000 [5.3K]1 year ago
4 0

Answer:

- \sqrt{2}

Step-by-step explanation:

cos90° - 2sin45° + 2tan180°

= 0 - ( 2 × \frac{\sqrt{2} }{2} ) + 2(0)

= 0 - \sqrt{2} + 0

= - \sqrt{2}

You might be interested in
What is the solution to the system of equations?
Trava [24]

Call the two equations above A and B, in order to not confuse them.

A: -2x + 6y = -38

B: 3x - 4y = 32

For this system we have opposites in x and y, so Elimination (or Linear Combination) works best. Either variable works, so let's work with x first and multiply A by 3 and B by 2. This is done so we get opposites in A and B then when added together give zero.

-2x + 6y = -38 ------> multiply by 3 ----> -6x + 18y = -114

3x - 4y = 32 ------> multiply by 2 -----> 6x - 8y = 64

Now we add the new equations. The -6x and 6x are opposites and go away. We are left with

10y = -50. We divide both sides by 10 and get that y = -5.

Now we take y = -5 and put it into an original equation. Let's use A.

-2x + 6y = -38 the original equation A

-2x + 6(-5) = -38 we found y = -5

-2x + (-30) = -38 evaluating and multiplying

-2x - 30 = -38 apply the parentheses

-2x = -8 add 30 to both sides

x = 4 divide on both sides by -2


Thus x = 4 and y = -5, or (4, -5) is the solution.

6 0
3 years ago
Read 2 more answers
Make a the subject get a on its own x(a+2)=7
crimeas [40]
X (a + 2) = 7

First let's multiply out the brackets on the left side of the equation.
x (a + 2) --> Multiply everything inside the brackets by x.
xa + 2x = 7

Now, both elements of the left-hand side of the equation contain x, so we can divide both sides of the equation by x.

xa + 2x = 7
    a + 2 = 7/x

To find a now, just subtract 2 from both sides.
a = 7/x - 2
7 0
3 years ago
Read 2 more answers
here are the first four terms of an arithmetic sequence: 6,13,20,27 write down, in terms of n, an expression for the nth term of
jonny [76]

common differences d = 7

A1 = 6

arithmetic sequence:

A(n)  = A1  + d(n - 1)

A(n) = 6 + d(n - 1)

Hope it helps

7 0
3 years ago
Find the probability that a person is male given that the person prefers hiking near lakes and streams. Let M= male and L= prefe
Romashka [77]

Regarding conditional probabilities, the keyword is always given, as a previous event is considered to have happened.

<h3>What is Conditional Probability?</h3>

Conditional probability is the probability of one event happening, considering a previous event. The formula is:

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which:

  • P(B|A) is the probability of event B happening, given that A happened.
  • P(A \cap B) is the probability of both A and B happening.
  • P(A) is the probability of A happening.

The previous event having happened is represented by keyword given.

More can be learned about conditional probability at brainly.com/question/14398287

#SPJ1

8 0
2 years ago
What is the volume of the following rectangular prism?
pav-90 [236]

Answer:

volume = 14 2/3 units³

Step-by-step explanation:

volume = 7 1/3(2) = 14 2/3 units³

8 0
3 years ago
Read 2 more answers
Other questions:
  • A drawer contains 4 red socks, 8 white socks, and 6 blue socks. Without looking, you draw out a sock, return it, and draw out a
    6·2 answers
  • What value does the 1 in the number 4,105.8
    14·2 answers
  • tammy is riding her bicycle. she rides for 27.5 kilometers at a speed of 11 kilometers per hr. how many hours does she ride?
    10·1 answer
  • .?????????????????????????
    11·1 answer
  • Dan drove 9 miles south and 12 miles east. What is the shortest distance to his starting point?
    14·1 answer
  • How many observations does this dot plot represent?
    12·2 answers
  • Which polynomials are in standard form? choose all answers that apply
    11·2 answers
  • Help Me with this please
    9·1 answer
  • Suppose a city with population 500,000 has been growing at a rate of ​7% per year. If this rate​ continues, find the population
    8·1 answer
  • The circumference of a circle is 11 inches. What is the area, in square inches, of the circle? Express your answer in terms of p
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!