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natulia [17]
3 years ago
11

Help please will give brainliest

Mathematics
2 answers:
Rom4ik [11]3 years ago
6 0
Number 18

C=16h
.............
Ne4ueva [31]3 years ago
3 0

Answer:

18.

a) 6k + 2y

b) 2x^2 + 2x

c) 16h

19.  4.5 cm

20.

a) x > 4.5

b) x >= 32

Step-by-step explanation:

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Cot(x)sec^4(x)=cot(x)+2tan(x)+tan^3(x) <br> prove the trig identity
adelina 88 [10]

Working with the right side:

cot(<em>x</em>) + 2 tan(<em>x</em>) + tan³(<em>x</em>) = cos(<em>x</em>)/sin(<em>x</em>) + 2 sin(<em>x</em>)/cos(<em>x</em>) + sin³(<em>x</em>)/cos³(<em>x</em>)

… = (cos⁴(<em>x</em>) + 2 sin²(<em>x</em>) cos²(<em>x</em>) + sin⁴(<em>x</em>)) / (sin(<em>x</em>) cos³(<em>x</em>))

Factorize the numerator as a sum of squares:

<em>a</em>⁴ + 2 <em>a</em>² <em>b</em>² + <em>b</em>⁴ = (<em>a</em>² + <em>b</em>²)²

… = (cos²(<em>x</em>) + sin²(<em>x</em>))² / (sin(<em>x</em>) cos³(<em>x</em>))

Recall that

cos²(<em>x</em>) + sin²(<em>x</em>) = 1

… = 1 / (sin(<em>x</em>) cos³(<em>x</em>))

… = 1 / (sin(<em>x</em>) cos³(<em>x</em>)) • cos(<em>x</em>)/cos(<em>x</em>)

… = cos(<em>x</em>) / (sin(<em>x</em>) cos⁴(<em>x</em>))

… = cot(<em>x</em>) sec⁴(<em>x</em>)

7 0
3 years ago
Can someone confirm why it's not? im *pretty* sure it's d?​
vampirchik [111]

Answer:

yes it is I'm sure of it ok.

8 0
3 years ago
Please help I desperately need it
DerKrebs [107]
A-12 miles
B- 9 miles
C-2 hours
D-9 hours
G 6 miles
H- 5 hours
5 0
3 years ago
Read 2 more answers
6th grade math help me pleaseee
trapecia [35]

Answer:

0

Step-by-step explanation:

7c =

7(0) = 0

hope you understand

5 0
3 years ago
Read 2 more answers
I’ll mark brainlest if you get right
Verizon [17]

Answer:

m<t=113

Step-by-step explanation:

42+92+2x=360

x=113

m<t=113

7 0
4 years ago
Read 2 more answers
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