Question

Use the method of adding y-coordinates to graph the function.

f (x) = sin x + cos x

Answer 1

Step 1 :

The function is .

Consider the composite functions as and .

Make a table for computing several points :

	0
	0	1	0.707	0	1	0.707	0
	1	0	0.707	1	0	0.707	1
	1	1	0	1	1	0	1
Point on the graph of f	(0, 1)

 

Comments

Contd.......

Step 2 :

Graph the functions and on the same coordinate system.

(1) Draw the coordinate plane.

(2) plot the points.

(3) connect the points with a smooth curve.

The graph is :

Solution :

The graph is :