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soldier1979 [14.2K]
3 years ago
12

I WILL GIVE BRAINLIEST IF ITS CORRECT

Mathematics
1 answer:
OlgaM077 [116]3 years ago
7 0

Answer:

3 1/4

Step-by-step explanation:

given the difference between the shortest and longest feather being 1 3/4 you add 1 3/4 to the shortest feather length

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If cos x= 5/13 and sin x <0 find cos (x/2) and sin (2x)
taurus [48]
We know that

if cos x is positive
and
sin x is negative
so
the angle x belong to the IV quadrant

cos x=5/13
we know that
sin²x+cos²x=1-------> sin²x=1-cos²x------> 1-(5/13)²---> 144/169
sin x=√(144/169)-------> sin x=12/13
but remember that x is on the IV quadrant
so
sin x=-12/13

Part A) <span>cos (x/2)
cos (x/2)=(+/-)</span>√[(1+cos x)/2]
cos (x/2)=(+/-)√[(1+5/13)/2]
cos (x/2)=(+/-)√[(18/13)/2]
cos (x/2)=(+/-)√[36/13]
cos (x/2)=(+/-)6/√13-------> cos (x/2)=(+/-)6√13/13
the angle (x/2) belong to the II quadrant
so
cos (x/2)=-6√√13/13

the answer Part A) is 
cos (x/2)=-6√√13/13

Part B) sin (2x)
sin (2x)=2*sin x* cos x------> 2*[-12/13]*[5/13]----> -120/169

the answer Part B) is 
sin(2x)=-120/169
4 0
3 years ago
Help ASAP, really stuck
SpyIntel [72]

The total length of the wire needed to make this shape is 162cm

<h3>Perimeter of a triangle</h3>

The perimeter of a triangle is the sum of the external side of the triangle.

Given the following parameters

Length of one side of the outside shape = 24cm

The side length of the smaller triangle = 24/4 = 6cm

The perimeter of the smallest triangle  3(6) = 18cm

The perimeter of the smaller triangle (at the middle) = 12(3) = 36cm

Total length of wire needed. = 3(24) + 3(18) + 36

Total length of wire needed = 72 + 54 + 36

Total length of wire needed = 162cm

Hence the total length of the wire needed to make this shape is 162cm

Learn more on perimeter of triangle here: brainly.com/question/24382052

#SPJ1

6 0
1 year ago
PLSSS HELP ME I WILL MARK!!!!!!!!
boyakko [2]
1/10*(f-220) or 0.1(f-220)
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2 years ago
Avery is enrolling in a university next semester. There are 14 meeting times for physics classes and 18 meeting times for art hi
nignag [31]
The answer is a - 1/4
6 0
3 years ago
The total bill for a dinner party
melamori03 [73]

Answer:


Step-by-step explanation:

There were 9 other people there. First you would subtract how much marcus paid from the total (134.03-20.45=113.58). After that you just divide the remaining cost with 12.62 (113.58/12.62=9)

6 0
2 years ago
Read 2 more answers
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