Question

Which triangle faction should be used to solve for the side BC if you know B and side AC

Answer 1

we have a right triangle, then we can use triangle fractions

to find CD with the angle B we use tangent because

`\tan (\alpha)=(O)/(A)`

where lapha is the reference angle(on this case B), O the opposite side from the triangle and A the adjacent side from the angle differente to the hypotenuse

`\tan (B)=(5)/(BC)`

and we can solve for BC

`BC=(5)/(\tan (B))`