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spayn [35]
3 years ago
15

Which number represents "nine and eighty-one thousandths?"

Mathematics
2 answers:
My name is Ann [436]3 years ago
6 0

Answer:

I think the answer is 9.081 because "and" meaning "." and it say 9 and 81 thousandths so it 9.081

Step-by-step explanation:

Lemur [1.5K]3 years ago
3 0

Answer:

9.081

Step-by-step explanation:

Chow,...!

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If tanA+sinA=m and tanA-sinA=n.prove that m^2-n^2=4√mn
mash [69]

Let a=\tan A and b=\sin A. Then

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and

mn=(a+b)(a-b)=a^2-b^2

\implies4\sqrt{mn}=4\sqrt{\tan^2A-\sin^2A}

The expression under the square root can be rewritten as

\tan^2A-\sin^2A=\dfrac{\sin^2A}{\cos^2A}-\sin^2A=\sin^2A\left(\dfrac1{\cos^2A}-1\right)=\sin^2A(\sec^2A-1)

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\tan^2A-\sin^2A=\sin^2A\tan^2A

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