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Margarita [4]
3 years ago
5

Triangle PQR has angles in the ratio of 2:3:5.

Mathematics
1 answer:
vazorg [7]3 years ago
3 0

Answer:(4) right angle

Step-by-step explanation:

you need to get 180 right solve it from there

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Prove that (Root of Sec A - 1 / Root of Sec A + 1) + (Root of Sec A + 1 / Root of Sec A - 1) = 2 cosec A
iVinArrow [24]

Answer:

The answer is below

Step-by-step explanation:

We need to prove that:

(Root of Sec A - 1 / Root of Sec A + 1) + (Root of Sec A + 1 / Root of Sec A - 1) = 2 cosec A.

Firstly, 1 / cos A = sec A, 1 / sin A = cosec A and tanA = sinA / cosA.

Also, 1 + tan²A = sec²A; sec²A - 1 = tan²A

\frac{\sqrt{secA-1} }{\sqrt{secA+1} } +\frac{\sqrt{secA+1} }{\sqrt{secA-1} } =\frac{(\sqrt{secA-1)}(\sqrt{secA-1})+(\sqrt{secA+1)}(\sqrt{secA+1}) }{(\sqrt{secA+1})(\sqrt{secA-1}) } \\\\=\frac{secA-1+(secA+1)}{\sqrt{sec^2A-secA+secA-1} } \\\\=\frac{2secA}{\sqrt{sec^2A-1} } \\\\=\frac{2secA}{\sqrt{tan^2A} } \\\\=\frac{2secA}{tanA} \\\\=\frac{2*\frac{1}{cosA} }{\frac{sinA}{cosA} }\\\\= 2*\frac{1}{cosA}*\frac{cosA}{sinA}\\\\=2*\frac{1}{sinAA}\\\\=2cosecA

7 0
3 years ago
A deli sells a sandwich bread for $6.40 per pound . Much do you have to pay for 24 ounces of the spread?
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I think it is $2.40 (but I am not too sure) try to get some more people to answer.
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3 0
2 years ago
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X-4/x-3 is less than 2x-1/2
kifflom [539]

Answer:

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Step-by-step explanation:

yes

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Nataly_w [17]

Answer:

$21/$1.50 per mile =14 miles. The units match $/($/mile), so division was the proper operation.

C

Step-by-step explanation:

Plz mark brainliest i need it

6 0
3 years ago
Read 2 more answers
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