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Afina-wow [57]
2 years ago
13

Use the product-to-sum identities to rewrite the following expression as a sum or difference.

Mathematics
1 answer:
PtichkaEL [24]2 years ago
3 0
Answer:

= cos4x

Explanation:

cosAcosB = [cos(A-B)+cos(A+B)]

Given: 2cos(2x)cos(2x)

= 2[cos(2x-2x)+cos(2x+2x)]

= 2cos4x^2
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the parabola y=x^2 is shifted up by 2 units and to the right by 3 units. what is the equation of the new porabola
Juli2301 [7.4K]
Up 2 units = y shifted up by 2:
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new equation:
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2 years ago
Find the area of an equilateral triangle (regular 3-gon) with the given measurement. 6-inch radius A = sq. in.
katovenus [111]
\bf \textit{area of an equilateral triangle}\\\\
A=\cfrac{s^2\sqrt{3}}{4}\qquad 
\begin{cases}
s=length~of\\
\qquad a~side\\
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s=6
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8 0
3 years ago
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cluponka [151]
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The height of a triangle is 7 ft more than its base. if the area of the triangle is 30 ft^ what is the lentgh of the base
Dmitriy789 [7]
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multiply the equation by 2
60=7x+x^2
subtract 60 from both sides
x^2+7x-60=0
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so base=5 and height=5+7=12
6 0
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The awnser to this is 2 and also 3
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