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disa [49]
3 years ago
5

Find the value of ( 1+cosA) (1-cosA)

Mathematics
1 answer:
Mandarinka [93]3 years ago
3 0

Answer:

sin^2 A

Step-by-step explanation:

first expand the trigonometry

1(1-cosA)+cosA(1-cosA)

=1-cosA+cosA-cos^2 A

= 1-cos^2 A

from trigonometric identity sin^2 A + cos^2 A= 1

sin^2 A= 1- cos^2 A

=sin^2 A

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find the area and perimeter using the lengthy and with step by step I will give 40 points please answer right number 6,7,9,10,11
N76 [4]

Answer:

6. 16 meters^2, 16 meters

7. 100 milimieters^2, 40 milimeters

9. 56 centimeters^2, 30 centimeters

10. 49 inches^2, 28 inches

11. 9 meters^2, 12 meters

12. 72 yards^2, 36 yards

Step-by-step explanation:

s is for a square

A=s^2

P=4s

l+w is for a rectangle

A=lw

P=2l+2w

6. A=4^2

A= 16 meters^2

P=4*4

P= 16 meters

7. A=10^2

A=100 milimieters^2

P=4*10

P= 40 milimeters

9. A=8*7

A= 56 centimeters^2

P=2(8)+2(7)

P=30 centimeters

10. A=7^2

A=49 inches^2

P=4*7

P=28 inches

11. A= 3^2

A=9 meters^2

P=4*3

P= 12 meters

12.

A=12*6

A=72 yards^2

P= 2(12)+2(6)

P= 36 yards

Let me know if you have any questions. Also, don't forget units!

4 0
3 years ago
The sum of 2 numbers is 84 if one number is 4.less than the other find the numbers​
artcher [175]

Answer:

one number= x = 44

the other number= (x-4)= 40

Step-by-step explanation:

one number= x

the other number= (x-4)

x + (x-4) = 84

2x= 84+4

2x= 88

x= 88/2= 44

one number= x = 44

the other number= (x-4)= 40

3 0
3 years ago
Read 2 more answers
What is<br><br> -2/3<br> -<br> 5/6<br><br> ?<br> Math/honors math/ Mathematics
Svetradugi [14.3K]

Answer:

-3/2 is your answer !!!!

7 0
3 years ago
Read 2 more answers
Somebody please help me!
Ierofanga [76]

Method:

First place the replace of p and r using brackets.

= 3(6) + 11.7(7)

3 times 6 is 18 and 11.7 times 7 is 81.9

= 18 + 81.9

add one and one together you get

= 99.9

<em>hope </em><em>it </em><em>helps</em>

6 0
3 years ago
Kelly wants to know the actual value of a house that she wants to buy. What should she do?
Ghella [55]
Kelly should ask the realtor.
5 0
3 years ago
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