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
mote1985 [20]
3 years ago
13

Angle is in standard position, if sin(0) = -1, and A<$< 3,4, find cos(O). Why?

Mathematics
2 answers:
Arlecino [84]3 years ago
7 0

Answer:

0

Step-by-step explanation:

Sin(theta) = -1

Theta = 270° or 3pi/2

Cos(theta) = 0

Reason:

sin²(0) + cos²(0) = 1

(-1)² + cos²(0) = 1

cos²(0) = 0

cos(0) = 0

Komok [63]3 years ago
3 0

Answer:

please explain what this is supposed to mean  A<$< 3,4,

Step-by-step explanation:

You might be interested in
Amna wants to rent a boat and spend less than 51 . The boat costs 6 per hour, and Amna has a discount coupon for 3 off What are
Sever21 [200]

Answer:

9 hours or less. with a $3 off coupon she could spend up to $54. divide that by $6 per hour and that gives you a possibility of nine hours of boat rental.

3 0
3 years ago
Does any know how to solve this problem
victus00 [196]

Answer: I cant see it

3 0
3 years ago
Can someone help me on problem number 8?
kramer
List the coordinates,
Coordinates are shown as (x,y) 
If 2+2+7+7 is 16
You make those your side lengths 
Coordinates are (9,7) (2,7) (2,5) (9,5) 
they maybe slightly off because of the broken peice of paper
8 0
3 years ago
Find the distance between P1(4,16degrees) and P2(-2,177degrees) on the polar plane.
bazaltina [42]
Polar coordinates give the distance from the origin and the angle from the positive x axis. Cartesian coordinates give the distance from the x and y axes.

You can draw a right triangle with these values. (see attached)
If you know the r value and theta of that triangle below, you can use trig to find x and y.

Let's convert (4, 16°) to Cartesian coordinates.

Note that since our angle is acute, (in Quadrant I) our sine and cosine will both be positive, as you should be able to derive from the unit circle, where cosine is represented as an x value and sine is represented as a y value.

cosine = adjacent / hypotenuse
cosθ = x/r
cos(16°) = x/4
4cos(16°) = x ≈ 3.84504678375

sine = oppsite / hypotenuse
sinθ = y/r
sin(16°) = y/4
4sin(16°) = y ≈ 1.10254942327<span>

So (4, 16°) </span>⇒ (3.84504678375, 1.10254942327).

Let's convert (-2, 177°)  to Cartesian coordinates.
Whenever you have a negative radius, that means to put the point opposite where it would have been if it had a positive radius. (see attached)

In that case, we can essentially add 180° to our current 177° to the same effect. That means that (-2, 177°) = (2, 357°).

Note that since our angle is in Quadrant IV, our cosine will be positive, but our sine will be negative. (as derived from the unit circle) We don't have to worry about this since our calculator figures this for us, but you should pay attention to it if you are converting from Cartesian to polar.

cosine = adjacent / hypotenuse
cosθ = x/r
cos(357°) = x/2
2cos(357°) = x ≈ 1.99725906951

sine = opposite / hypotenuse
sinθ = y/r
sin(357°) = y/2
2sin(357°) = y ≈ -0.10467191248

So (-2, 177°) ⇒ (1.99725906951, -0.10467191248).

Now we must use the distance formula with our two points.
d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}
d\approx\sqrt{(1.99725906951-3.84504678375)^2+(-0.10467191248-1.10254942327)^2}
d\approx\sqrt{-1.84778771^2+-1.20722134^2}
d\approx\sqrt{3.41431942+1.45738336}
d\approx\sqrt{4.87170278}
\boxed{d\approx2.20719342}

7 0
3 years ago
if you start on the unit circle at (0,-1) and move 360° in the counterclockwise direction, at what angle measure on the unit cir
maks197457 [2]

Answer:

270°

Step-by-step explanation:

(0, -1) is at the 270° angle.  If you do a 360°, you end up back where you started, so the angle is still 270°.

6 0
3 years ago
Other questions:
  • Alexis recieved an 85,89,92on three tests.How many points does she need to score on her next test in order to have an average of
    7·2 answers
  • What is the value of x?<br> help PLS
    15·1 answer
  • Why is it important to convert rates to the same units before comparing them
    10·1 answer
  • Work out the surface area of this solid prism.
    12·1 answer
  • Help please lol :)).
    11·1 answer
  • I need an example of ‘what is a 3rd degree polynomial with two terms’ ?
    9·1 answer
  • Mr. Kory owns a corn dog stand. In August, he lowered the price of his corn dogs by 10%. As a result, he sold 25% more corn dogs
    9·1 answer
  • Explain how science is a system
    13·2 answers
  • Help with this math question
    14·1 answer
  • Help, please the question and thank you
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!