Question
A tugboat is traveling at 30 miles per hour at a compass heading of 38 degrees. The current is from the direction of 125 degrees moving at 7 mph. Find the resultant speed and the direction of the boat.
I understand the concept and that I must use the law of cosines. I got 30^2+7^2-2(30)(7)cosine of ___. I don't understand how to find the angle.
I appreciate your time, thank you.
I understand the concept and that I must use the law of cosines. I got 30^2+7^2-2(30)(7)cosine of ___. I don't understand how to find the angle.
I appreciate your time, thank you.
Answers
Draw a diagram. Label the angles in the drawing, and you will see that the angle you must use is 180-38-35 = 107°
Be sure to note that the current is coming <u>from</u> the direction of 125°. That means the current's <u>flow</u> is in the direction 305°.
Be sure to note that the current is coming <u>from</u> the direction of 125°. That means the current's <u>flow</u> is in the direction 305°.