Question 1185011
An ocean liner heading west at 25 km/hr comes into a current of 15.0 km/hr directed 30 degrees north of east. Find the new velocity of the liner. 
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Heading west is 270 degs
30 degrees north of east is 060 degs
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Makes a triangle with sides of 25 and 15 with an included angle of 30 degs.
The resultant speed is the 3rd side of the triangle.
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Draw the 25 side originating at the Origin.
The resultant heading is 270 degs + the angle at the Origin.
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PS  Boats don't use km/hr, the use knots for speed.