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Rom4ik [11]
3 years ago
8

I need someone to help me with mý math homework please help!

Mathematics
1 answer:
Julli [10]3 years ago
7 0
Which question do you need help with
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9x+1/2y51<br> 7x+1/3y=39
olga2289 [7]
What’s the question though lol
7 0
2 years ago
(1+sin y)(1+sin (-y))=cos^2 y)
Sloan [31]
(1+siny)(1+sin(-y))=cos^2y\\\\L=(1+siny)(1-siny)=1^2-sin^2y=1-sin^2y=cos^2y\\\\R=cos^2y\\\\L=R


sin(-x)=-sinx\\\\sin^2x+cos^2x=1\to1-sin^2x=cos^2x\\\\(a+b)(a-b)=a^2-b^2
4 0
2 years ago
Read 2 more answers
In figure find the area of the red part.​
larisa [96]

Step-by-step explanation:

Given : A rectangle 4 x 8 , a semicircle

Diagonal intersecting semicircle  

To Find :Area of red part

<h3>Solution:</h3>

Angle AC make AB   α = ∠BAC

tan α = BC/AB = 4/8 = 1/2

=> α = 26.565°

∠ECA = ∠BAC = α

EC = EF = 4

=> ∠CEF = 180° - 2α

∠AED = 45°  as   AE is  diagonal of Square of side  4

=> ∠AEF  + 180° - 2α + 45° = 180°

=>  ∠AEF =  2α - 45°  = 8.13°

in Left side area  between square  and circle is split in 2 Equal parts

(1/2) area - area AFG = area of Red part

in Left side area  between square  and circle  = 4² - (1/4)π4²

= 3.4336 sq unit

half  =  1.7168 sq unit  

Now find area AFG = area ΔAEF - sector EGF

area ΔAEF  

AE = 4√2  , EF = 4    angle = 8.13°

area ΔAEF   = (1/2) 4√2 * 4 sin 8.13° = 1.6 sq unit

area  sector EGF  = (8.13/360)π4² = 1.135  sq unit

area AFG  = 1.6 - 1.135  = 0.465 sq unit

Area of Red part = 1.7168 - 0.465 sq unit

= 1.2518 sq unit

= 1.252  sq unit

= 1.25 sq unit.

Hope this helps!!

5 0
2 years ago
Read 2 more answers
What is the slope of the line that passes through (-8,-16) and (18,5)?
snow_lady [41]
(y2-y1)/(x2-x1)=
slope: 21/26

5 0
3 years ago
Read 2 more answers
Which container could logically have a capacity of 1,000 liters ? A kitchen sink B bathtub C measuring cup D Hot tub
Artist 52 [7]
If it makes it any easier, when you see "a thousand liters," think of 260 gallons of milk. Which do you think could it fill up without going over?
7 0
3 years ago
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