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salantis [7]
2 years ago
11

Please help. Use your calculator to work out. (:

Mathematics
1 answer:
Lisa [10]2 years ago
5 0

Answer:

83.6155156

Step-by-step explanation:

\frac{ {16}^{2} - 17 }{ \sqrt{2.3 + 5.87} }  \\  \\  =  \frac{ 256 - 17 }{ \sqrt{8.17} }  \\  \\  =  \frac{ 239}{2.85832119 }  \\  \\  = 83.6155156 \\

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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

m^2-n^2=(a+b)^2-(a-b)^2=(a^2+2ab+b^2)-(a^2-2ab+b^2)=4ab

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and

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The expression under the square root can be rewritten as

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

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Step-by-step explanation:

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Answer:

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3 0
2 years ago
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