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rosijanka [135]
3 years ago
14

How to find cos2theta

Mathematics
2 answers:
horrorfan [7]3 years ago
8 0
These are the double angle formulas. What the other person mentioned above is the sum and difference formula.

SSSSS [86.1K]3 years ago
5 0
You can use the sum and difference identities which for cosine is cos(a+b)= cosacosb-sinasinb
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19. Which one of the following statements expresses a true proportion?
choli [55]
That would be : 3:5 = 12:20....because 3/5 = 12/20
7 0
3 years ago
Juan and Bill share a 12-ounce bucket of clay. By the end of the week, Juan has used 1 6 of the bucket, and Bill has used 2 3 of
White raven [17]

Answer: 2 ounces

Step-by-step explanation:

Since Juan and Bill share a 12-ounce bucket of clay and Juan used 1/6 of the bucket, the quantity used by Juan will be:

= 1/6 × 12

= 2 ounce bucket of clay.

On the other hand, Bill used 2/3 of the bucket of clay. The quantity used will be:

= 2/3 × 12

= 8 ounce

Therefore, the quantity they both used will be:

= 2 ounce + 8 ounce

= 10 ounces.

The ounces left in the bucket will be:

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5 0
2 years ago
Find the equation of the axis of symmetry and the coordinates of the vertex of the graph of the function.
alexira [117]

Answer:

b.  x = 0 ; (0,4)

Step-by-step explanation:

To quickly solve this problem, we can use a graphing tool or a calculator to plot the equation.

Please see the attached image below, to find more information about the graph .

The equation is:

y=2*x^2+4

We can appreciate that the axis of symmetry corresponds to the y-axis, which  is equal to the line x = 0

The vertex corresponds to the minimum point of the function.

V = (0,4)

Correct option: b.

5 0
3 years ago
Find the missing<br> measure of the<br> triangle given the<br> angle measurements.<br> 75°, 30°, y
Ket [755]

Answer:

75

Step-by-step explanation:

If a triangle = 180 degrees, then subtract 105 by 180, and you get 75!

4 0
1 year ago
What’s the median of 2, 4, 5, 7 ,7 , 15
Tresset [83]

Answer:

6

Step-by-step explanation:

the middle number of the given list

7 0
3 years ago
Read 2 more answers
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