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3 years ago

If sin 115° ≈ 0.91 and cos 115° = -0.42, then sin -115° =

Mathematics

1 answer:

EastWind [94]3 years ago

3 0

Answer:

sin -115° = -0.91

Step-by-step explanation:

Point A is (cos 115°, sin 115°). Since cos 115° = -0.42 and sin 115° ≈ 0.91, it means that the coordinates at point A is (-0.42, 0.91).

As for point B which was revolved around -115°,

the coordinates will be similar to point A but you just have to change the negative.

B(cos -115°, sin -115°) = B(0.42, -0.91)

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Which equation is related to the given equation? column a column b 1. 61 + 18 = z 2. z = 61 – 18 3. –18 = 61 – z 4. 18 = 61 – z

Fofino [41]

Question 1.).

Column A.):

Answer ==> z = 61 – 18, is Related to z + 18 = 61, ==> z = 43

Answer: ===> 18 = 61 - z, is Related to z + 18 = 61, ===> z = 43

z + 18 = 61

Let's solve your equation step-by-step.

z + 18 = 61

Step 1: Subtract 18 from both sides.

z + 18 − 18 = 61 − 18

z = 43

Graph: ========> z + 18 = 61 =========> z =======> 43

Column (A), Answer: =======> z = 43

Question 2.).

Column. B.):

Answer: =====> 61 + 18 = z, Related to z - 18 = 61 ====> z = 79 Answer: ===> –18 = 61 – z, Related to z - 18 = 61 ====> z = 79

z - 18 = 61

Let's solve your equation step-by-step.

z − 18 = 61

Step 1: Add 18 to both sides.

z − 18 + 18 = 61 + 18

z = 79

Answer z = 79

Therefore, The answers to your Equation: Column (A),/Column (B)

Question 1.).

Column A.):

Answer ==> z = 61 – 18, is Related to z + 18 = 61, ==> z = 43

Answer: ===> 18 = 61 - z, is Related to z + 18 = 61, ===> z = 43

Question 2.).

Column. B.):

Answer: =====> 61 + 18 = z, Related to z - 18 = 61 ====> z = 79 Answer: ===> –18 = 61 – z, Related to z - 18 = 61 ====> z = 79

Hope that helps!!!!!!!! : )

7 0

3 years ago

Read 2 more answers

3. A car starts from rest and accelerates uniformly over a time of 6.21 seconds

Klio2033 [76]

We have,

t = 6.21 s

s = 111 m

u = 0 m/s

To determine: "a" of the particle.

We know,

s = ut + ½ at²

⇒ s = ½ at²

⇒ a = 2s/t²

⇒ a = [2(111 m)]/(6.21 s)²

⇒ a = (222 m)/(38.5641 s²)

⇒ a ≈ 5.75 m/s²

5 0

3 years ago

Your friend claims that because each midsegment is half as long as the corresponding side of the triangle, the perimeter of the

AlexFokin [52]

Answer:
The claim is correct

Explanation:
Assume the given triangle ABC
perimeter of triangle ABC = AB + BC + CA ............> I

Now, we have:
D is the midpoint of AB, this means that:
AD = DB = (1/2) AB ..........> 1
E is the midpoint of AC, this means that:
AE = EC = (1/2) AC ...........> 2
DE is the midsegment in triangle ABC, this means that:
DE = (1/2) BC ...........> 3
perimeter of triangle ADE = AD + DE + EA
Substitute in this equation with the corresponding lengths in 1,2 and 3:
perimeter of triangle ADE = (1/2) AB + (1/2) BC = (1/2) AC
perimeter of triangle ADE = (1/2)(AB+BC+AC) .........> II

From I and II, we can prove that:
perimeter of triangle ADE = (1/2) perimeter of triangle ABC
Which means that:
perimeter of midsegment triangle is half the perimeter of the original triangle.

Hope this helps :)

7 0

3 years ago

Identify the transformation at the right.

emmainna [20.7K]

Answer:

what transformation and is there and mulitple choice questions

Step-by-step explanation:

4 0

3 years ago

A person in an helicopter flying at a height of 700 meters, observes two objects lying opposite to each other on either side of

weqwewe [10]

Answer:

Let C be the position of a person in a helicopter. A,B be two objects lying opposite to each other on either bank of a river.

Let AD=x,BD=y

In ΔACD,

⇒tan30

⇒

700

⇒x=130

⇒x=130(1.732)=1212.4

∴ the width of the river =x+y

=1212.4+130

=1342.4m

Step-by-step explanation:

6 0

3 years ago