trig

A barge is pulled by two tugboats. The first tugboat is traveling at a speed of 16 knots with heading 135°, and the second tugboat is traveling at a speed of 15 knots with heading 195°. Find the resulting speed and direction of the barge. (Round your answers to the nearest whole number.)

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asked by janice
  1. V = 16Knots @ 135o+15Knots @ 195o.

    X = 16*cos135 + 15*cos195 = -25.80 Knots
    Y = 16*sin135 + 15*sin195 = 7.43 Knots.

    tanA = Y/X = 7.43/-25.80 = -0.28798
    Ar = -16.07o = Reference angle.
    A = -16.07 + 180 = 164o = Direction.

    V = X/cosA = -25.80/cos164 = 27 Knots.

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    posted by Henry

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