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How do you solve this question?
..........................................................

Harnoor , 6 Years ago
Grade 11
anser 1 Answers
yhramaraju

Last Activity: 5 Years ago

We have r1-r=4Rsin^2(A÷2)
12k-2k=20ksin^2(A÷2)
sin(A÷2)=(1÷2^(1÷2))=sin45degrees
(A÷2)=45degrees
A=90degrees

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