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lyudmila [28]
3 years ago
5

Which expression is equivalent to 2cos2(x/2)-cos(x)

Mathematics
1 answer:
Pavel [41]3 years ago
3 0

Answer:

B

Step-by-step explanation:

Edge

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10. How can you use similar triangles to solve real-world problems?​
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Similar triangles can be extremely useful in architecture. For example, similar triangles can help represent doors and how far they swing. Also when using shadows that make the triangles you can use them to find the height of an actual object they can be used to construct many architectural designs and monuments for e.g, bridges. You can also determine values that you can’t directly measure. For e.g you. Can measure the length of your shadow and a tree’s shadow on a sunny day.
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3 years ago
Anyone who understand this for 16 point s plz
Zielflug [23.3K]

This is pretty open-ended.  How about:

\sqrt 2 and \sqrt 3 are similar because they're both irrational, meaning neither is the ratio of two integers.

\sqrt 2 and \sqrt 3 are different because \sqrt{2} < 1.5} and \sqrt{3} > 1.5.


5 0
3 years ago
rashid can paint 2 square feet of fence in 10 minutes how long will it take him to paint a fence 6 feet high by 25 feet long
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The area of the fence is 6*25=150 square feet.
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7 0
3 years ago
Read 2 more answers
A substance has a density of 0.70 g/mL, if it has a volume of 3.0 mL, what is its mass?
Naddika [18.5K]

Answer:

<h2>2.1 g</h2>

Step-by-step explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 0.70 × 3

We have the final answer as

<h3>2.1 g</h3>

Hope this helps you

4 0
3 years ago
Write the quadratic equation whose roots are -3 and 2 , and whose leading coefficient is 5
KiRa [710]

Step-by-step explanation:

Since, roots are - 3 & 2

Therefore, (x + 3) & (x - 2) would be factors.

Leading coefficient is 5

Hence, required quadratic equation is:

5(x + 3)(x - 2) = 0 \\   \therefore \:  5( {x}^{2}  - 2x + 3x - 6)  = 0\\  \therefore \:  5( {x}^{2}  + x - 6)  = 0\\ \therefore \: 5 {x}^{2}  + 5x - 30  = 0\:  \\ is \: the \: required \:   quadratic \: equation.

5 0
3 years ago
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