Question

Help thank youuu
can u show ur work and do is asap

Answer 1

Set your calculator to degree mode.

`( \sin(a) )/(13) = ( \sin(x) )/(12)`

`\sin(a) = (13 \sin(x) )/(12)`

`a = {sin}^( - 1) ( (13 \sin(x) )/(12) )`

`2x + x + {sin}^( - 1) ( (13 \sin(x) )/(12)) = 180`

`x = 43.806\: degrees`

BC/sin(87.612°) = 12/sin(43.806°)

BC = about 17.321