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V125BC [204]
2 years ago
9

Using addition formulas for sine and cosine to simplify the expression:

Mathematics
1 answer:
luda_lava [24]2 years ago
6 0
Are these the answer choices. If so I would say D
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Question 27 <br> Find the length of the hypotenuse. Leave answer in simplest radical form.
skelet666 [1.2K]

Use SOHCAHTOA.  Since we are looking for the hypotenuse, you must use sine or cosine.  Since, we are given the adjacent side, use cosine.

cosx=a/h

cos45=8/h

√2/2=8/h

<em>*Cross multiply*</em>

h√2=16

<em>*Divide both sides by √2*</em>

h=16/√2

<em>*Multiply by √2/√2*</em>

h=(16√2)/2

<em>*Simplify the fraction*</em>

h=8√2

Hope this helps!!

6 0
3 years ago
Is 27/51 equal to 18/34
Nata [24]
Yes.
27/51-18/34=0
if something minus something is zero, then the 2 numbers subtracting each other are equal. :)
7 0
3 years ago
Read 2 more answers
A class of 28 students has 13 boys and 15 girls. What is the ratio of girls to boys in the class? 15:28 13:15 O 13:28 15:13 Prev
uranmaximum [27]

Answer:\frac{15}{13}

Step-by-step explanation:

Given

There are 28 students in a class out of which

13 are boys so the remaining 15 are girls

Ratio of girls to boys in the class=\frac{15}{13}

8 0
3 years ago
Some investments in the stock market have earned 10% annually. At this rate , earnings can be found using the formua A=P(1.10)^n
Lerok [7]
<span>The earnings by a stock invested at r% for n years is obtained by the formular A = P(1 + r)^n; where P is the initial investment = 1,500; r is the interest rate = 10% and n is the numberof years of the investment. Here A = 1,500(1 + 0.1)^18 = 1,500(1.1)^18 = 8,339.88.Hope this helps. Let me know if you need additional help!</span>
8 0
3 years ago
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-2 • (-3)3 = ?<br><br> i really need help, I’m struggling so much in math.
Ronch [10]

Answer:

The answer would be 54

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
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