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alekssr [168]
3 years ago
14

Let cos(2x)/cos(x)+sin(x) = 0 where 0° ≤ x ≤ 180°. What are the possible values for x?

Mathematics
1 answer:
Harrizon [31]3 years ago
5 0

Answer:

C

Step-by-step explanation:

\frac{cos2x}{cos x+sin x} =\frac{cos^2x-sin^2x}{cos x+sin x} =\frac{(cos~x+sin~x)(cos~x-sin~x)}{(cos~x+sin~x)} =cos~x-sin~x\\so~cos~x-sin~x=0\\divide ~by~cos~x\\1-tan~ x=0\\\\tan~x=1=tan ~45,tan (180+45)\\x=45^\circ,225^\circ

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ankoles [38]

Answer:

Let suppose the quantity be x^{y} where x=Base, y=exponent

Now, if the base is multiplied by itself

i.e , x \times x=x^{2}

If we raise the power of base multiply by itself by y/2, then it becomes equal to the quantity given.

[x^{2}]^{\frac{y}{2}}=x^{y}=Quantity

Or if we raise the power of quantity by 2/y , then it becomes equal to base multiply by itself.

[x^{y}]^{\frac{2}{y}}= x^{2}

Quantity=x^{y}=[base\times base]^{\frac{y}{2}}=[x^{2}]^{\frac{y}{2}}




4 0
3 years ago
What is the answer and I don't understand the question
Licemer1 [7]
Welp this would haft to me 68
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3 years ago
Giving the 2 sides of the triangle, find the range of all possible lengths for the third side.
Zinaida [17]

Answer:

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Step-by-step explanation:

The minimum third side is the difference of the given sides; the maximum third side is their sum.

If you like, you can have a spreadsheet calculate these for you. That seems like more work than just doing them in your head.

4 0
3 years ago
Choose the graph of y=|x+4| by translating the parent function
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<span>Choose the graph of y=|x+4| by translating the parent function 
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well the answer is c.....



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4 years ago
<img src="https://tex.z-dn.net/?f=81%20%5Cfrac%7B1%7D%7B2%7D%20%20%5Ctimes%20121%20%5Cfrac%7B1%7D%7B2%7D%20" id="TexFormula1" ti
scoundrel [369]
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3 years ago
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