8 The graph of y = a cos(x + b) for 0
2
1
60
120
180
240
300
360
-1
-2
(a) Find the value of a and the value of b.
a
b =
(2)
Another curve C has equation y = f(x)
The coordinates of the minimum point of Care (4, 5)
(b) Write down the coordinates of the minimum point of the curve with
equation
(O y = f (2x)
(..........
..)
(y = f(x) - 7
(..........
I (2)
(Total for Question 8 is 4 marks)
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