differentiation is slope(ratio of change in y with respect to x), slope is also considered as instantaneous value. slope refers to (ratio of change is y with respect to x : refer to straight line formla)
sin is ratio of opp/hyp , give values of to opp and hyp, it always varies between 0, 1/2, 1/root 2, 1. at sin0 ratio of opp/hyp is 0 at sin90 ratio is 1
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