If cos A =3/5, cos B=4/5 and (-pi)/(2) l...

If `cos A =3/5, cos B=4/5 and (-pi)/(2) lt A lt 0,(-pi)/(2) lt B lt 0,` then the value of `2 sin A+4 sin B=`

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The correct Answer is:

`(2 (1+sqrt(3)))/(sqrt(3)(sqrt(3)+sqrt(2)))`

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