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
san4es73 [151]
3 years ago
7

Using the unit circle, determine the value of cos(-150°).

Mathematics
2 answers:
elena-14-01-66 [18.8K]3 years ago
5 0
<h3>Answer:  -\frac{\sqrt{3}}{2}</h3>

Explanation:

The identity we'll use is cos(-x) = cos(x) for any value of x.

So cos(-150) = cos(150).

Then locate the angle 150 on the unit circle. The terminal point is \left(-\frac{\sqrt{3}}{2}, \frac{1}{2}\right)

The x coordinate of this terminal point is the value of cos(150).

yaroslaw [1]3 years ago
5 0

Answer:

Cos(-150°)=-√3/2

Step-by-step explanation:

-150° is found at the third quadrant so the cost value at third quadrant is negative

Cos(-150°)= -cos(30)=-cos(210)

Cos(-150°)=- (√3/2)

Cos(-150°)=-√3/2

Hope it helps

You might be interested in
If F(x) = 2 - xand w(x) = x - 2, what is the range of (w•p(x)?
hoa [83]

Answer:

Th Range is [0, -∞)

Step-by-step explanation:

f(x) = 2 - x

w(x) = x - 2

We want to find the range of (f * w)(x).

First, we need to find (f * w)(x), which is the multiplication of the function f(x) and the function w(x). Lets use algebra to find (f * w)(x):

(f*w)(x)=(2-x)(x-2)\\=2x-4-x^2+2x\\=-x^2+4x-4

This is a quadratic function (U shaped), or a parabola. The graph is attached.

The range is the set of y-values for which the function is defined.

We see from the graph that the parabola is upside down and the highest value is y = 0 and lowest goes towards negative infinity. So the range is from 0 to negative infinity. Or,

0 < y < ∞

In interval notation, that would be:

[0, -∞)

4 0
3 years ago
What is 25 5/10 x 3 as a mixed number?
Dvinal [7]

Answer:

This has the steps and the answer tell if you want the websites name

7 0
3 years ago
A parent increases a child’s monthly allowance by 20% each year. If the allowance is $8 per month now, in about how many years w
Mazyrski [523]

6 years

A parent increases a child’s monthly allowance by 20% each year. If the allowance is $8 per month now. This is an exponential function, An exponential function is given by:

Let x be the number of years and y be the allowance. The initial allowance is $8, this means at x = 0, y = 8

Since it increases by 20% each year, i.e 100% + 20% = 1 + 0.2 = 1.2. This means that b = 1.2
Therefore:

To find the number of years will it take to reach $20 per month, we substitute y = 20 and find x

x = 6 years to the nearest year
8 0
3 years ago
1+4.25n+3/2p-3+(-2p)+5/4n
alex41 [277]

Answer:

11/2n+-1/2p-2

Step-by-step explanation:

simplification

3 0
2 years ago
GIVEAWAY!! QUICK QUESTION!!!
Dmitry [639]

Answer:

<u>-2</u>

Step-by-step explanation:

<u>Given</u> :

  • An example of a coefficient ⇒ '11' in 11kk

<u>Solving</u> :

  • The coefficient is the part that precedes the variable(s)
  • Therefore, on solving -k - k
  • ⇒ -2k
  • ⇒ <u>-2 is the coefficient</u>
7 0
2 years ago
Read 2 more answers
Other questions:
  • 1 Which expressions are equivalent to 2 -36 +- ? Check all that apply 30+ + 1 + 2 + 3 + 4 +5 4 1 +30 5 2 O 2 + 3 + 4 1 275 +-+30
    15·1 answer
  • What is the inequality
    7·1 answer
  • Investing in bonds! PLS HELP
    5·1 answer
  • A circle has a circumfence of 3.14 units what is the diameter of this circle ?
    6·1 answer
  • Graph the solution for the following system of inequalities. Click on the graph until the correct solution is displayed. x + y &
    5·2 answers
  • A parallelogram has an area of 300 square kilometers and a height of 20 kilometers. What is the length of the base?
    10·1 answer
  • What is the name for additional footage you collect when covering a story
    5·1 answer
  • Please help Asap if possible
    12·2 answers
  • If someone could help me with coordinates, i would really appreciate it.
    5·1 answer
  • A college student borrows $1000 for 3 months to pay for a semester of school. If the interest is $20.63, find the monthly paymen
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!