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tamaranim1 [39]
3 years ago
8

I NEED HELP PLEASE, THANKS :)

Mathematics
2 answers:
mrs_skeptik [129]3 years ago
8 0

Answer:

3rd option: f(x)⇒ +∞ as x⇒-∞ and f(x)⇒ -∞ as x⇒ +∞

Step-by-step explanation:

This is a negative cubic graph, therefore:

Looking at the graph, as x goes towards negative infinity, the y values go toward positive infinity.

On the other hand, as x goes towards positive infinity, the y values go towards negative infinity.

irina1246 [14]3 years ago
7 0
Agree with the answer above good luck
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Veseljchak [2.6K]

Answer:

f(x+5) = -3x-21

Step-by-step explanation:

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G)<br>(Sin 5A - Sin 7A - Sin 4A + Sin 8A)÷<br>(Cos 4A - Cos 5A - Cos 8A + Cos 7A)=<br>Cot 6A​
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We use a similar strategy as in your previous question. Rewrite:

sin(5<em>x</em>) = sin(6<em>x</em> - <em>x</em>) = sin(6<em>x</em>) cos(<em>x</em>) - cos(6<em>x</em>) sin(<em>x</em>)

sin(7<em>x</em>) = sin(6<em>x</em> + <em>x</em>) = sin(6<em>x</em>) cos(<em>x</em>) + cos(6<em>x</em>) sin(<em>x</em>)

→ sin(5<em>x</em>) - sin(7<em>x</em>) = -2 cos(6<em>x</em>) sin(<em>x</em>)

sin(4<em>x</em>) = sin(6<em>x</em> - 2<em>x</em>) = sin(6<em>x</em>) cos(2<em>x</em>) - cos(6<em>x</em>) sin(2<em>x</em>)

sin(8<em>x</em>) = sin(6<em>x</em> + 2<em>x</em>) = sin(6<em>x</em>) cos(2<em>x</em>) + cos(6<em>x</em>) sin(2<em>x</em>)

→   sin(8<em>x</em>) - sin(4<em>x</em>) = 2 cos(6<em>x</em>) sin(2<em>x</em>)

cos(5<em>x</em>) = cos(6<em>x</em> - <em>x</em>) = cos(6<em>x</em>) cos(<em>x</em>) + sin(6<em>x</em>) sin(<em>x</em>)

cos(7<em>x</em>) = cos(6<em>x</em> + <em>x</em>) = cos(6<em>x</em>) cos(<em>x</em>) - sin(6<em>x</em>) sin(<em>x</em>)

→   cos(7<em>x</em>) - cos(5<em>x</em>) = -2 sin(6<em>x</em>) sin(<em>x</em>)

cos(4<em>x</em>) = cos(6<em>x</em> - 2<em>x</em>) = cos(6<em>x</em>) cos(2<em>x</em>) + sin(6<em>x</em>) sin(2<em>x</em>)

cos(8<em>x</em>) = cos(6<em>x</em> + 2<em>x</em>) = cos(6<em>x</em>) cos(2<em>x</em>) - sin(6<em>x</em>) sin(2<em>x</em>)

→   cos(4<em>x</em>) - cos(8<em>x</em>) = 2 sin(6<em>x</em>) sin(2<em>x</em>)

Then

(sin(5<em>x</em>) - sin(7<em>x</em>) - sin(4<em>x</em>) + sin(8<em>x</em>)) / (cos(4<em>x</em>) - cos(5<em>x</em>) - cos(8<em>x</em>) + cos(7<em>x</em>))

= (2 cos(6<em>x</em>) sin(2<em>x</em>) - 2 cos(6<em>x</em>) sin(<em>x</em>)) / (2 sin(6<em>x</em>) sin(2<em>x</em>) - 2 sin(6<em>x</em>) sin(<em>x</em>))

= (2 cos(6<em>x</em>) (sin(2<em>x</em>) - sin(<em>x</em>))) / (2 sin(6<em>x</em>) (sin(2<em>x</em>) - sin(<em>x</em>)))

= cos(6<em>x</em>) / sin(6<em>x</em>)

= cot(6<em>x</em>)

QED

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