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question mark

in trangle ABC angle C=90 degrees,
AB=c ,BC= a, AC=b and b2=ac
then cos B=
1)1/2
2)root5 -1/2
3)root5-1/4
4)1/4
full length solution plss

noor , 9 Years ago
Grade 11
anser 1 Answers
Saurabh Koranglekar

Last Activity: 5 Years ago

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