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(a) Complete the table below, giving your values correct to 2 decimal places.

(b) Using the grid provided, draw the graph of y= cos 2 x and y=sin(x+`30^0`) for `0^0lexle180^0` Take 1 cm to represent `15^0` 0 on the x-axis and 4 cm to represent 1 unit on the y-axis.
(c) Find the period of the curve y=cos2x
(d) Using the graph in part
(b) above, estimate the solutions to the equation sin `(x+30^0)`=cos2x