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Question

In a triangle PQR, R = π2 If tan P2and tanQ2are the roots of the equation \( ax^2\) +bx+c=0 (a0), then:


A

a+b=c

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B

b+c=a

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C

a+c=b

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D

b=c

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Solution

The correct option is A

a+b=c


P+Q=π2

P2+Q2=π4

tan(P2+Q2)=tanπ4

1 = tanP2+tanQ21tanP2tanQ2

tanP2+tanQ2=ba

tanP2tanQ2=ca

1 = ba1ca=bac


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