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Luden [163]
3 years ago
15

If the sin 30° is 1 over 2, then the cos ____° = _____.

Mathematics
2 answers:
Ahat [919]3 years ago
8 0

Answer:

Below.

Step-by-step explanation:

(sine) sin=30=1/2

=cos [90-30]

Which means cos=60

Same as:

(cosine) cos=60=1/2 or Sin30=Cos 60=1/2

Hence, the answer is...

cos 60° = ½....

By:✨ RobloxYt ✨

kotykmax [81]3 years ago
6 0

Step-by-step explanation:

The sine of an angle is the same as the cosine of its complement.

If sin 30° = ½, then cos 60° = ½.

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The tables below show running hours of three printers that produce greeting cards and the total number of greeting cards produce
AysviL [449]

<u>ANSWER</u>

The correct answer is A


<u>EXPLANATION</u>



To find the ink cost of each card coming from printer  B, we need to find the total cost from printer B and the total number of cards printed by Printer B.


The total hours of all the three printers over the three weeks

=40+45+55+50+50+30+45+40+60=415


The total hours of printer B only

=50+50+30=130


Total number of cards produced over the three weeks


=7950+7800+9600=25350


We can use ratio and proportion to determine the total cards produce by printer B only.


415:25350


130:x


If less, more divides


x=\frac{130\times 25350}{415} \approx7941


Total cost of Printer B in 130 hours

$=130 \times 15=1950


The ink cost

=\frac{1950}{7941}


=0.2456


$\approx 0.30

to 2 decimal places

8 0
3 years ago
Read 2 more answers
Use the figure to find x.
velikii [3]

Answer:

Step-by-step explanation:

The sides of a 30-60-90 triangle are in the ratio 1:√3:2

The side opposite the 30° angle is (12√6)÷2 = 6/√6.

The side opposite the 60° angle is √3×6/√6 = 6/√2 =3√2.

The sides of a 45-45-90 triangle are in the ratio 1:1:√2

The hypotenuse is 3√2, so the side opposite the 45° angle is 3.

x = 3

3 0
3 years ago
What is the common factors of 74.48 And 52.50
timofeeve [1]
The common factors are 1 and 2.
Factors of 74.48:
1,2,37,74
Factors of 52.50:
1,2,4,13,26,52
6 0
3 years ago
The Garcias are on their way to the beach. They are traveling at a rate of 30 miles per hour. Use the ordered pairs to grab the
Dominik [7]

Answer:

30

Step-by-step explanation:

5 0
3 years ago
Verify the identity. cos quanity x plus pi divided by two = -sin x
7nadin3 [17]

Answer:

see below

Step-by-step explanation:

cos ( x+pi/2) = -sinx

We know that

cos(A + B) = cos A cos B - sin A sin B

Let x = A and pi/2 = B

cos x cos pi/2 - sin x sin pi/2 = -sin x

We know cos pi/2 = 0  and sin pi/2 = 1

cos x * 0 - sin x *1 = -sin x

- sin x = - sin x

4 0
3 years ago
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