How to know in which direction is cos component ad in which direction is sin component to the resultant vector?
Asked by 25th July 2012, 5:59 PM
Answered by Expert
Suppose there is a vector which makes an angle of "a" with the x-axis, then as it can be seen from the diagram, that if we drop a projection from the end of the vector to x axis, then it will make a right angle triangle and now we can apply relations of trigonometry that:
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