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3 years ago

What is the reference angle or quadrantal angle of sin330°?

Mathematics

1 answer:

DIA [1.3K]3 years ago

3 0

Answer:

-1/2

Step-by-step explanation:

Exact form:-1/2

Decimal form: -0.5

Hope that helps.

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19NBoli

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I don't understand this...

romanna [79]

The measurement of angles are :

Angle 1 is 123°
Angle 2 is 57°
Angle 4 is 123°
Angle 5 is 123°
Angle 6 is 57°
Angle 7 is 57°
Angle 8 is 123°

Given,

The figure with parallel lines.

Angle 3 is given as 57°

We have to find the other angles.

The measure of angle 1;

∠1 + ∠3 = 180° ; Sum of transversal angles is 180°

So,

∠1 = 180 - 57 = 123°

The measure of angle 2;

∠2 = ∠3 ; Vertical angles are ≅

So, ∠2 = 57°

The measure of angle 4;

∠1 = ∠4 ; Vertical angles are ≅

So, ∠4 = 123°

The measure of angle 5;

∠1 = ∠5 ; Corresponding angles are ≅

So, ∠5 = 123°

The measure of angle 6;

∠2 = ∠6 ; Corresponding angles are ≅

So, ∠6 = 57°

The measure of angle 7;

∠6 = ∠7 ; Vertical angles are ≅

So, ∠7 = 57°

The measure of angle 8;

∠5 = ∠8 ; Vertical angles are ≅

So, ∠8 = 123°

Learn more about angles here;

brainly.com/question/21867627

#SPJ1

8 0

1 year ago

What is 88% of 44 HELP

Neko [114]

44 x .88 = 38.72

38.72 / 100 = .3872

6 0

4 years ago

Read 2 more answers

Estimate<br>7,049<br>+1,859

alexandr1967 [171]

7049 needs to be rounded to the nearest thousand = 7000

1859 needs to be rounded to the nearest hundred = 1900

7000+1900= 8900

8 0

3 years ago

The circumference of a circle is 30t. What is its area?

labwork [276]

Answer:

$A=\frac{225t^2}{\pi}$ given the circumference is 30t.

Step-by-step explanation:

The circumference of a circle is $C=2\pi r$ and the area of a circle is $A=\pi r^2$ assuming the radius is $r$ for the circle in question.

We are given the circumference of our circle is $2 \pi r=30t$ .

If we solve this for r we get: $r=\frac{30t}{2\pi}$ . To get this I just divided both sides by $2\pi$ since this was the thing being multiplied to $r$ .

So now the area is $A=\pi r^2=\pi (\frac{30t}{2 \pi})^2$ .

Simplifying this:

$A=\pi (\frac{30t}{2 \pi})^2$ .

30/2=15 so:

$A=\pi (\frac{15t}{\pi})^2$ .

Squaring the numerator and the denominator:

$A=\pi (\frac{(15t)^2}{(\pi)^2}$

Using law of exponents or seeing that a factor of $\pi$ cancels:

$A=\frac{(15t)^2}{\pi}$

$A=\frac{15^2t^2}{\pi}$

$A=\frac{225t^2}{\pi}$

4 0

3 years ago

I need help, please!!

lord [1]

T(d)= 2(d-1) + 30

T(6)= 2(6-1) + 30
= 40 mins

5 0

3 years ago