(a) Copy and complete the table of values for y = 3Sinx + 7Cosx for 0°

xº	0	20	40	60	80	100	120	140	160	180
y	7.0				4.2		-0.9

 

(b) Using a scale of 2cm to 20° on the x-axis and 2cm to 2 units on the y-axis, draw the graph of y = 3Sinx + 7Cosx for 0°

(c) Using the graph, find the;

(i) value of y when x= 150°,

(i) range of values of x for which y > 0.