<PRE><B>Question 1067936</B>
Bearings are measured clockwise from North, therefore
:
Angle BAC is 20 degrees
Angle ACB is 90 degrees
Angle ABC is 70 degrees
:
tan(20) = BC / 10
a) BC = 10 * tan(20) = 3.64 Km
:
sin(70) = 10 / AB
b) AB = 10 / sin(70) = 10.64 Km
:
Note that (3.64)^2 + 10^2 = (10.64)^2
:
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