In a `DeltaABC`, if a = 5, `B=45^(@)` and `c=2sqrt(2)`, then b=A. `sqr – InterviewSolution

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1.	In a `DeltaABC`, if a = 5, `B=45^(@)` and `c=2sqrt(2)`, then b=A. `sqrt(3)`B. 6C. `2sqrt(13)`D. `sqrt(13)`
Answer» Correct Answer - D We have, `cosB=(a^(2)+c^(2)-b^(2))/(2ac)` `implies cos45^(@)=(25+8-b^(2))/(20sqrt(2))implies(1)/(2)=(33-b^(2))/(20sqrt(2))impliesb=sqrt(13)`

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