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Monica [59]
3 years ago
5

SOMEONE HELP Find sinD, sinE, cosD, and cosE. Write each answer as a fraction in simplest form.

Mathematics
1 answer:
Wewaii [24]3 years ago
4 0

Answer:

Step-by-step explanation:

sinD = opposite/hypotenuse = 12/15 = 4/5

cosD = adjacent/ hypotenuse = 9/15 = 3/5

sinE = opposite/hypotenuse = 9/15 = 3/5

cosE = adjacent/ hypotenuse = 12/15 = 4/5

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Please help with all 3 questions and show all work thank you.
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1. 8+8=16
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3 years ago
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You work at Dave's Donut Shop. Dave has asked you to determine how much each box of a dozen donuts should cost. There are 12 don
Archy [21]

Answer:

Donuts(b) = 12*b

Step-by-step explanation:

Notice that the question is:

What's an expression to model the number of donuts in b boxes?

We know that we are talking of boxes of a dozen donuts.

We know that in one dozen, we have 12 donuts.

Then if we have b boxes, and in each box we have 12 donuts, we will have a total of b times 12 donuts, the expression is:

Donuts(b) = 12*b

There is a lot of information here that we did not use (like the cost of cardboard and donuts), and that may be there just to distract us, the important thing to do here is:

See what is the thing we want to find (in this case, the number of donuts in b boxes)

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3 years ago
Use a half-angle identity to find the exact value
Tatiana [17]

Given:

\cos 15^{\circ}

To find:

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$\cos 15^{\circ}=\cos\frac{ 30^{\circ}}{2}

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$\cos \frac{30^{\circ}}{2}=\sqrt{\frac{1+\cos \left(30^{\circ}\right)}{2}}

Using the trigonometric identity: \cos \left(30^{\circ}\right)=\frac{\sqrt{3}}{2}

            $=\sqrt{\frac{1+\frac{\sqrt{3}}{2}}{2}}

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            $=\sqrt{\frac {2+\sqrt{3}}{4}}

Apply radical rule: \sqrt[n]{\frac{a}{b}}=\frac{\sqrt[n]{a}}{\sqrt[n]{b}}

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Using \sqrt{4} =2:

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5 0
3 years ago
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MatroZZZ [7]

Answer:

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Step-by-step explanation:

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In this question:

First option 4 is elevated, so not exponential decay.

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Look at the attachment<br>Simplified it too <br>pls take it seriously ​
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