The first graph represents sin(2x), the second graph represents sin(-x) and the third graph represents sin(x/2) .
There are some rules for transformation of graph of various functions which are as follows :-
- For F(x) →f(−x) = Reflection about the y-axis
- For F(x) → f(ax) = It will depend upon value of a chosen
- If |a|>1 then f(ax) is f(x) squashed horizontally by a factor of a
- If 0<|a|<1 then f(ax) is f(x) is stretched horizontally by factor of a
- If a<0 then is f(ax) is f(x) also reflected in the y-axis
By keeping in mind these rules it is easily observable that the first graph is sinx squashed horizontally by a factor of 2 while second graph is reflection of sinx about the y-axis and the third graph is sinx horizontally stretched by a factor of 2.
Thus the first graph represents sin(2x), the second graph represents
sin(-x) and the third graph represents sin(x/2)
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