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musickatia [10]
3 years ago
6

Poop I don't know what to do-

Mathematics
1 answer:
Romashka [77]3 years ago
3 0

Me either ive been stuck on a question and no one will help me

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Find A and B if sin2xcos3x = A sin 5x + B sin x
patriot [66]
Recall that

\sin(x+y)=\sin x\cos y+\cos x\sin y
\sin(x-y)=\sin x\cos y-\cos x\sin y

Adding these together, you have

\sin(x+y)+\sin(x-y)=2\sin x\cos y
\dfrac12\sin(x+y)+\dfrac12\sin(x-y)=\sin x\cos y

Replace x with 2x and y with 3x. You end up with

\dfrac12\sin(2x+3x)+\dfrac12\sin(2x-3x)=\sin2x\cos3x
\sin2x\cos3x=\dfrac12\sin5x+\dfrac12\sin(-x)=\dfrac12\sin5x-\dfrac12\sin x

and so A=\dfrac12 and B=-\dfrac12.
7 0
3 years ago
A. 11/1=165/h<br> B. 11/1=h/165<br> C. 132/12=h/165<br> D=12/132=165/h<br><br> plz help
Hunter-Best [27]

D=12/132=165/h

Hope dis helps! :D

3 0
3 years ago
Will mark you brainly.​
timofeeve [1]

Answer:

number 1 - 14 books

7 0
3 years ago
Read 2 more answers
$875 at 9.5% compunded twice a year. How much money will there be in 5years?
TEA [102]
P = A(1+i)ⁿ, where:
A= initial value
I = interest in %
n= period of compound investment.
However, if the interest is paid twice a year, that means you have to divide the interest by 2 and the period becomes twice n
P = 875(1+9.5%/2)⁵ˣ²
P = 875(1+4.75%)¹⁰
P =875( 1.0475)¹⁰
P =  $1,391.7
5 0
4 years ago
The real statue of liberty is 152 feet tall. If you wanted to build a toy model of the statue to sell to tourists that is 2:101
NISA [10]

Answer:

Height of toy model liberty statue = 3 feet (Approx.)

Step-by-step explanation:

Given:

Height of real liberty statue = 152 feet

Scale factor = 2:101

Find:

Height of toy model liberty statue

Computation:

Scale factor = 2:101

1 feet toy model = 101 / 2 = 50.5 feet

Height of toy model liberty statue = Height of real liberty statue / Scale factor

Height of toy model liberty statue = 152 / 50.5

Height of toy model liberty statue = 3 feet (Approx.)

3 0
3 years ago
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