Asked by Husna u gambo
A boy walk 6km from a point P to a point Q on a bearing of 065. He then walk to a point R, a distance of 13km ,on a bearing of 146.(1) sketch the diagram of his movement. (2) find the distance of PR
Answers
Answered by
mathhelper
After you made your sketch you will see that triangle PQR has angle Q = 99°, and
we can just use the cosine law:
PR^2 = 6^2 + 13^2 - 2(6)(13)cos99°
=36+169-(-24.403...)
= 229.403..
PR = √299.403.. = 15.146
we can just use the cosine law:
PR^2 = 6^2 + 13^2 - 2(6)(13)cos99°
=36+169-(-24.403...)
= 229.403..
PR = √299.403.. = 15.146
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