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polet [3.4K]
3 years ago
15

How do I show the identity of cos(6x) = 2cos^2(3x)-1

Mathematics
1 answer:
notsponge [240]3 years ago
4 0
You are given the function of  identity of cos(6x) = 2cos^2(3x)-1. <span>A sine and cosine function is one of the basic functions encountered in Trigonometry. Sine is equal to the opposite side over hypotenuse whereas the cosine function is equal to the adjacent side over the hypotenuse.</span>

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krok68 [10]
The answer this problem is -247
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Bumek [7]
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3 years ago
The length of a rectangular picture frame is 2 inches shorter than its width. If the perimeter of
jok3333 [9.3K]

Answer:

Length = 12 inches

Width = 14 inches

Step-by-step explanation:

Formula for perimeter of a rectangle is;

P = 2(L + W)

Where;

L is length

W is width

We are told that the length is 2 inches shorter than its width. Thus;

L = (W - 2)

Thus,perimeter is now;

P = 2(W - 2 + W)

P = 2(2W - 2)

P = 4W - 4

We are told that the perimeter is 52. Thus;

4W - 4 = 52

4W = 52 + 4

4W = 56

W = 56/4

W = 14 inches

From L = (W - 2) ;

L = 14 - 2

L = 12 inches

3 0
3 years ago
I need help with this it's urgent!
borishaifa [10]

Oh shucks man, I'm sorry bout that

4 0
3 years ago
If y° and 150° form a linear pair , then y° ?​
yaroslaw [1]

Answer:

30 degrees

Step-by-step explanation:

A linear pair of angles add upto 180

So, y+150=180

y=180-150

=30

5 0
3 years ago
Read 2 more answers
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