160k views
1 vote
BC=? Please help fast, I'm lost.

BC=? Please help fast, I'm lost.-example-1
User Vafylec
by
3.1k points

2 Answers

10 votes

Answer:

30.2

Explanation:

cos(58) = 16/BC

BC = 16/cos(58) = 30.2

User Franz Ebner
by
3.4k points
3 votes

Answer:

Explanation:

You have to use the sine law

Start by finding < B

<B + 58 + 93 = 180 Combine

<B + 151 = 180 Subtract 151 from both sides.

<B = 29

Now set up the sine law ratios

Sin (93) / BC = Sin (29) / 16

Sin(93) = 0.999

Sin(29) = 0.485

Now put these values into the Sin law found above.

0.999 / BC = 0.485 / 16 Cross Multiply

BC*0.485 = 16*0.999 Combine

BC *0.485 = 15.984 Divide by 0.485

BC = 15.984/0.485

BC = 32.857

User TJL
by
3.9k points