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xz_007 [3.2K]
3 years ago
12

Which fundamental identity is used in the second step of proof?

Mathematics
1 answer:
stepladder [879]3 years ago
4 0

Answer:

C) sin^2(Ф) + cos^2(Ф) = 1

Step-by-step explanation:

sin^2(Ф) - cos^2(Ф)sin^2(Ф) = sin^4(Ф)

LHS = sin^2(Ф) - cos^2(Ф)sin^2(Ф)

Step 1: sin^2(Ф) [ 1 - cos^2(Ф)]

Now we use the identity sin^2(Ф) + cos^2(Ф) = 1 because sin^2(Ф) = 1- cos^2(Ф)

Step 2: Using the above identity

sin^2(Ф) (sin^2(Ф)) = sin^4 (Ф)

Answer: C) sin^2(Ф) + cos^2(Ф) = 1

Hope this will helpful.

Thank you.

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Solve If QR = 6x + 1, PR = 14x - 13, and PQ = 5x - 2, find PR
solong [7]

Answer:

P____Q____R

PR= PQ+ QR

(14x-13) = (5x-2)+(6x+1)

14x-13= 11x – 1

14x – 11x = 13–1

3x = 12

x= 12/ 3

x= 4

PR= 14x – 13 = 14 (4) – 13 = 18 – 13= 5

If you want (PQ , QR ) this is the solution

PQ =5x-2=5(4)-2=20-2=18

QR =6x+1=6(4)+1=24+1=25

I hope I helped you^_^

7 0
3 years ago
A survey of 50 people found that 14 people like building a snowman. If 600 people had responded, how many would have been expect
Nimfa-mama [501]

Answer:

168, a little of both

Step-by-step explanation:

Make 14 out of 50, 14/50 simplified its 7/25, multiply it by 600 and you get 168 its a little of both because half the info we were given its experimental since it is not theorized, what we're being given (the question) and what we gave is theorized since we didn't actually perform an experiment to get a real answer

4 0
3 years ago
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Gina wants to ship 3 books that weigh 2 7/16 pounds, 1 7/8 pounds and 1/2 pound. the maximum weight she can ship is 6 pounds. ho
pshichka [43]
You have to find a common denominator 1st then add. So 16 is the common denominator the problem should be 2 7/16+1 14/16+8-16= 3 29/16 then you need to divide 29/16 you will have 4 13/16
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3 years ago
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(25)2×100÷23+[24÷(13−5)]
hram777 [196]

Answer:

100*100/23+(24/8)

100*100/23+3

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43.7+3

46.7

Step-by-step explanation:

7 0
3 years ago
Find the inverse of g(x)=1/3x - 7 and then find its domain and range if you can show steps that would be gladly appreciated than
Schach [20]

Answer:

g-1(x) = 3(x + 7).

Domain is All Real values of x.

Range is All Real values of the function.

Step-by-step explanation:

Let y = 1/3 x - 7

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Multiply both sides by 3:

x = 3(y + 7)

So the inverse of g(x) = g-1(x) = 3(x + 7).

Domain is All Real values of x.

Range is All Real values of the function.

6 0
3 years ago
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