Math Destroyer 2016 - Test 5, Law of Sines, #27

[Charles_Darwin]

Could someone explain #27 from practice test 5 to me? I understand the concept of the law of sines, but don't understand why we are saying BC = 0.3 x 200. Where did 200 come from?

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[LuckBloodandSweat]

I'll be on it in a moment

 

[LuckBloodandSweat]

Ok sending a pic of how i did it lol. I almost overcomplicated it by making a new right triangle but i realized sin 17.5 is given. one sec.

 

[LuckBloodandSweat]

I wouldn't show this much work for myself lol but here it is. Let me know if this is good enough haha.

 

[Charles_Darwin]

I wouldn't show this much work for myself lol but here it is. Let me know if this is good enough haha.

Ohhhhhhhh!!! I completely forgot that I knew what the value of sin(30) was lol. I was like... how did they know sin(30)= 0.5? And then it hit me lol. Thank you so much!!