Please help. I dont know if this is the right subject to put this question but, can you please help me with this question? How did he get this vector diagram? I really can't think of a reason why..

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radicalsniper · Answer

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anonymous · Answer

using similar triangles. Right below the 30 degree angle, extend the axis to construct a right triangle making the angle complementary to it equal to 60. It indicates in the question that at a speed of 6ft/s there will be a resultant angle of 45 degrees. So far we have 2 angles of the total three in the right triangle and so that leaves the third equal to 75