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tamaranim1 [39]
2 years ago
14

No clue how to do this

Mathematics
1 answer:
andreev551 [17]2 years ago
7 0

B is your awnser! sorry if im wrong my calc shows its without a  - symbol

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How to solve<br><br> 3sin^2x= cos^2x
DochEvi [55]

I'll try it.
I just went through this twice on scratch paper.  The first time was to
see if I could do it, and the second time was because the first result
I got was ridiculous.  But I think I got it.

You said                                                 <span><u>3sin²(x) = cos²(x)</u>

Use this trig identity:  sin²(x) = 1 - cos²(x)   

                                   Plug it into the original equation for (x).

                                                     3(1 - cos²(x) )  =  cos²(x)

Remove parentheses on the left:    3 - 3cos²(x)  =  cos²(x)

Add  3cos²(x)  to each side:            3                  =  4cos²(x)

Divide each side by  4 :                  3/4  =  cos²(x)

Take the square root of each side:    <em>cos(x) = (√3) / 2</em> .

There it is ... the cosine of the unknown angle.
Now you just go look it up in a book with a table cosines,
or else pinch it through your computer or your calculator,
or else just remember that you've learned that

                           cos( <em><u>30°</u></em> )  =  </span><span><span>(√3) / 2 </span>.


</span>
7 0
3 years ago
You are designing a staircase to reach a second floor that is 113" above the ground floor of a building. The owner of the buildi
gtnhenbr [62]

Answer:

Step-by-step explanation:

total height, H = 113 inches

height of each stair case, h = 7.25 inches

Number of stair case, n = total height / height of each stair case

n = 113 / 7.25 = 15.6

7 0
3 years ago
A cyclist rides his bike 18 miles per hour what is the speed in minutes? How many miles will the cyclist travel in 10 minutes
Crazy boy [7]

Answer:

Step-by-step explanation:

18 miles..................60 min

18/60= 0.30 miles/ min

10  minutes   0.30*10=3 miles

3 0
2 years ago
Read 2 more answers
The bakers can make 33 bagels in 30 minutes. How many bagels can they make in 18 hours. What is the rate per hour.
grin007 [14]

Answer:

1188 bagels

Step-by-step explanation:

u multiply 18 by 2 and then the answer for 33

6 0
3 years ago
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Another way to write 1/2
earnstyle [38]
½=0.5.................
3 0
3 years ago
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