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anygoal [31]
3 years ago
5

How do you find the sine, cosine, and tangent values on the unit circle not in the first quadrant? Provide an example, and how y

ou would find the sine, cosine, and tangent of the value you chose
Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
7 0
A point (-0.8, 0.6) will be a point on the unit circle in the second quadrant. Since it is a unit circle, its radius is 1, and we have
  sin(α) = y = 0.6
  cos(α) = x = -0.8
  tan(α) = y/x = 0.6/-0.8 = -0.75

The angle is α = arccos(-0.8) ≈ 143.13°

______
For the unit circle, the trig values are always the coordinates or their ratio as shown above, regardless of quadrant.
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In ∆ABC acute angles are in the ratio 5:1, i.e. ∠BAC : ∠ABC = 5:1. If
shtirl [24]
Use an app called Socratic, take a photo of the questions you're stuck on, then it will help you in stages and show you the answer.
6 0
3 years ago
The length of each side of a triangle is increased by 30%. By what percentage is the area increased?
patriot [66]

Answer:

When sides are doubled, the area of new triangle will always be 4 times the original, the change in area will be 3 times. Hence the % change will always be 300% irrespective of the type of triangle.

Step-by-step explanation:


5 0
3 years ago
Find the surface area of the tool box. Round your answer to the nearest tenth and explain your answer. ​Pls I NEED THE ANSWER NO
Andrej [43]

Answer:

807.8 in^2

Step-by-step explanation:

The total area of the box is the sum of the areas of all faces of the box. The top, bottom, front, and back faces are rectangles 18 in long. The end faces each consist of a rectangle and a triangle. We can compute the sum of these like this:

The areas of top, bottom, front, and back add up to be 18 inches wide by the length that is the perimeter of the end: 2·5in +2·8 in + 9.6 in = 35.8 in. That lateral area is ...

(18 in)(35.6 in) = 640.8 in^2

The area of the triangle on each end is equivalent to the area of a rectangle half as high, so we can compute the area of each end as ...

(9.6 in)(8.7 in) = 83.52 in^2

Then the total area is the lateral area plus the area of the two ends:

640.8 in^2 + 2·83.52 in^2 = 807.84 in^2 ≈ 807.8 in^2

7 0
3 years ago
What number is being factored in this factor tree? <br><br>A.72<br> B.180 <br>C.216<br> D.324
Tatiana [17]

Answer:

not sure if it's ryt but I think it's A

7 0
3 years ago
The fifth term of the number parttern 15,10,5,0
pshichka [43]

Answer:

Step-by-step explanation: -5

7 0
1 year ago
Read 2 more answers
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