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If A,B,C are positive acute angles and s...

If `A,B,C` are positive acute angles and `sin(B+C-A)=cos(C+A-B)=tan(A+B-C)=1` then `A,B,C` are

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The correct Answer is:
A`=22(1)/(2), B=67(1)/(2),C=45^(@)`.
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