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pishuonlain [190]
4 years ago
8

=" align="absmiddle" class="latex-formula">±\sqrt{\frac{1+cosx}{2} }, if A=\frac{x}{2} then cosA=
Mathematics
1 answer:
11Alexandr11 [23.1K]4 years ago
3 0

Answer:

  \cos{A}=\pm\sqrt{\dfrac{1+\cos{x}}{2}}

Step-by-step explanation:

\cos{A}=\cos{\frac{x}{2}}=\pm\sqrt{\dfrac{1+\cos{x}}{2}}

Apparently, you're supposed to recognize that the formula tells you the value of cos(x/2).

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Can someone please help me with this question pretty pls :(((??????
Charra [1.4K]

let me know if the propositions they gave don't match with mine.

thanks

4 0
4 years ago
A roof is shaped like a cone with a diameter of 12 feet. One bundle of shingles covers 32 square feet. How many bundles should y
max2010maxim [7]

Answer:

113.04 (6 + g) / 32

Step-by-step explanation:

We know that the total area of a cone is:

A = Pi * r * (r + g), let g be the generatrix.

The radius is half the diameter, therefore, 12/2 = 6 feet.

Replacing:

A = 3.14 * (6) * (6 + g) = 113.04 (6 + g) square feet.

To know the total number of tiles package, we must divide the area of the cone by the area occupied by a package. So:

113.04 (6 + g) / 32

The problem statement does not have a height or the value of the generatrix therefore it is not possible to calculate the number of packages.

3 0
3 years ago
Rachel has 30 pounds of a mixture of candy that sells for $1.00/lb. If lollipops sell for $0.95/lb and caramel candies sell for
dimulka [17.4K]
L = pounds of lollipop
c = pounds of caramel candies

0.95l + 1.10c = 30 ($0.95/lb & $1.10/lb)
l + c = 30 (mixture sells for $1/lb)
c = 30 - l

0.95l + 1.10(30 - l) = 30 (Substitution)
0.95l + 33 - 1.10l = 30
-0.15l = -3 (move terms)
l = 20lbs

Hope this helps.
4 0
4 years ago
CAN SOMEONE JUST PLEASE ANSWER THIS ASAP FOR BRAINLIEST!!!!
gizmo_the_mogwai [7]

Answer:

When the ball hit the ground, the height of the ball will be zero. So using the value of h(x) as zero in the given equation, we can find the time in which the ball will hit the ground.


0 = -(x-2)^2 + 16


(x-2)^2 = 16


x-2 = 16


x-2 = 4


x = 6


This means the ball will hit the ground 6 seconds after Amir threw it.



Step-by-step explanation:


7 0
4 years ago
Lindsey owes $5,381 on a credit card with a 24.9% interest rate compounded monthly. What is the monthly payment she should make
Digiron [165]
If you multiply .249*5381= 1339.87
3 0
3 years ago
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