Ans
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it will not be cos@2-cos@1 as it is not the component along the rod instead it must be sin@1+sin@2 as it is the component perpendicular to the rod . it was a coincidence that the and was 45° because of which (sin@1+sin@2) and (cos@2-cos@1) got the same value.
suggeation:don't memorise the formula in therms of x and y axis. but memorise it in the form of normal component and component along the rod
5 years ago
by
PURUVASU SINGH