NEED ASAP A person walks for 100 yards then turns through an angle of 60° and walks another hundred yards. How far is she from her starting point? Please help!! I’m not sure wha…

Question

asked Feb 15, 2020 49.3k views

1 Answer

Karellm · Answer 1 · 2020-02-19T16:23:23+0000

Answer:

$100\ yd$

Explanation:

we know that

Applying the law of cosines

c^(2) =a^(2)+b^(2)-2(a)(b)cos(C)

In this problem we have

c-----> is the distance from her starting point

$a=100\ yd$

$b=100\ yd$

$C=60\°$

substitute

$c^(2) =100^(2)+100^(2)-2(100)(100)cos(60\°)$

c^(2) =10,000+10,000-10,000

c^(2) =10,000

$c=100\ yd$