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nataly862011 [7]
3 years ago
15

Please don't give me a link as an answer

Mathematics
2 answers:
tino4ka555 [31]3 years ago
6 0

Answer:

x=2

Step-by-step explanation:

x+2=4

x=2

Kitty [74]3 years ago
6 0
X+2=4 2=4 sum like tha
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3.=a.\\\\\dfrac{\sin x-1}{\sin x+1}=\dfrac{\sin x-1}{\sin x+1}\cdot\dfrac{\sin x+1}{\sin x+1}=\dfrac{\sin^2x-1^2}{(\sin x+1)^2}=\dfrac{\sin^2x-1}{(\sin x+1)^2}\\\\=\dfrac{-(1-\sin^2x)}{(\sin x+1)^2}=\dfrac{-\cos^2x}{(\sin x+1)^2}\\\\Used:\\(a-b)(a+b)=a^2-b^2\\\\\sin^2x+\cos^2x=1\to \cos^2x=1-\sin^2x
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The answer is f hope this helps
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