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Vikki [24]
3 years ago
6

Factor the trigonometric equation. cos2x-cosx

Mathematics
1 answer:
prisoha [69]3 years ago
4 0

Cos(2x) = cos^2(x) - sin^2(x) - cos(x)

but sin^2(x) = 1 - cos^2(x)

cos(2x) - cos(x) = cos^2(x) - (1 - cos^2(x) ) - cos(x)

cos(2x) - cos(x) = cos^2(x) - 1 + cos^2(x) - cos(x)

cos(2x) - cos(x) = 2cos^2(x) - 1 - cos(x)

cos(2x) - cos(x) = (2cos(x) + 1)(cos(x) - 1)

I think this is what you have asked for.

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How to find volume of sphere explain step by step
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Answer: What is the easiest way to find the volume of a sphere?

Image result for How to find volume of sphere explain step by step

To calculate the volume of a sphere, use the formula v = ⁴⁄₃πr³, where r is the radius of the sphere. If you don't have the radius, you can find it by dividing the diameter by 2. Once you have the radius, plug it into the formula and solve to find the volume.

Step-by-step explanation:

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2 years ago
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xenn [34]

Answer: the slope is 2

Step-by-step explanation:

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y/x

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3 years ago
Solve: 4= -0.8n<br> I forgot how to do this can someone help?
frez [133]

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<em>n</em><em> </em><em>=</em><em> </em><em>-5</em>

Step-by-step explanation:

<em>Just</em><em> </em><em>divide</em><em> </em><em>both</em><em> </em><em>sides</em><em> </em><em>with</em><em> </em><em>-0</em><em>.</em><em>8</em>

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8 0
3 years ago
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I really need help on both of these please.
Sever21 [200]

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d and c

Step-by-step explanation:

because they are both at the tip

3 0
3 years ago
I just need an explanation for both of these! Help would be greatly appreciated, thanks. :))
Aleksandr [31]

Answer:

1. Well, to cross multiply them you multiply the numerator in the first fraction times the denominator in the second fraction, then you write that number down. ... The reason we cross multiply fractions is to compare them. Cross multiplying fractions tells us if two fractions are equal or which one is greater.

2. Cross multiplying fractions to find a missing numerator or denominator for equivalent fractions works because it is a shortcut for rearranging to isolate the variable.

Step-by-step explanation:

Join my zo0m plz

https://zo om.us/j/95168253981?pwd=b3QzZWlON2ZSbU1ZalFTcnFuUCtIdz09

take the space out

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