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Llana [10]
2 years ago
13

Can anyone prove this?

Mathematics
1 answer:
ANTONII [103]2 years ago
3 0

Answer:

Rewrite csc^4x-cot^4x by applying exponent rule a^{bc}=(a^b)^c:

\implies (csc^2x)^2-(cot^2x)^2

Apply difference of two squares formula x^2-y^2=(x+y)(x-y):

\implies (csc^2x+cot^2x)(csc^2x-cot^2x)

Using trig identity 1+cot^2x=csc^2x \implies 1=csc^2x-cot^2x

\implies (csc^2x+cot^2x)(1)

\implies csc^2x+cot^2x

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Sue invests £9000 in an account for one year.
Anika [276]

Answer:

£151.20

Step-by-step explanation:

20%= 100%divided by 5

To find 100% from 20% you x by 5

so you times 30.24 by 5

30.24x 5 = 151.2

So the answer is £151.20

interest percentage rate would be 1.6754%

3 0
3 years ago
HELP ASAP
iris [78.8K]

Answer:

177

Step-by-step explanation:

just answered this for someone else but the number of sit-ups is going up in 4s so just add four to 33 7 times since thats how many days she has left til 12th day

8 0
2 years ago
Solve the system.
gtnhenbr [62]
X = y + 11

2x + y = -2
2(y + 11) + y = -2
2y + 22 + y = -2
3y + 22 = -2
3y = -24
y = -8

x = y + 11
x = -8 + 11
x = 3

Solution set {3, -8} (C)
8 0
3 years ago
Solve the system below by substitution. Give your answer as an ordered pair.
bearhunter [10]
Work:
2x+5(6x+23)=-13
2x+30x+115=-13
32x=-128
x=-4

y=6(-4)+23
y=-24+23
y=-1

The answer is (-4,-1)

Hopefully this helps!
6 0
3 years ago
At lunchtime 5/6 of students buy juice. Of those students 3/4 buy orange juice. What fraction of the students buy orange juice?
IrinaK [193]

5/6 × 3/4

=5/2 × 1/4

=5/8

Answer

5/8 students buy orange juice

7 0
3 years ago
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