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Complete the table below by filling in the blank spaces.

Draw the graph of y=2 sin x and y= cos 2x using the axes on the grid provided.
(a) What is the difference in the values of y=2 sin x and y= cos 2x at x=`(67 1/2 )^0`?
(b) State the periods of
(i) y=2 sinx
(ii) y=cos 2x