### Learning Math and Coding with Robots

 Grid: Tics Lines: Width px Hash Lines: Width px Labels: Font px Trace Lines: Robot 1: Width px Robot 2: Width px Robot 3: Width px Robot 4: Width px
 Axes: x-axis y-axis Show Grid Grid: 24x24 inches 36x36 inches 72x72 inches 96x96 inches 192x192 inches Quad: 4 quadrants 1 quadrant Hardware Units: US Customary Metric
 Background:

#### Robot 1

 Initial Position: ( in, in) Initial Angle: deg Current Position: (0 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 2

 Initial Position: ( in, in) Initial Angle: deg Current Position: (6 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 3

 Initial Position: ( in, in) Initial Angle: deg Current Position: (12 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

#### Robot 4

 Initial Position: ( in, in) Initial Angle: deg Current Position: (18 in, 0 in) Current Angle: 90 deg Wheel Radius: 1.75 in1.625 in2.0 in Track Width: in

Graphing Cosine
Problem Statement:
You do not need to add any blocks. Run the program and enter values for the variables a, b, c, and d to change the shape of the graph. Try to obtain a graph that appears as a standard cosine curve.
```/* Code generated by RoboBlockly v2.0 */
double x;
double y;
double a;
double b;
double c;
double d;
double trackwidth = 3.69;
int count;

x = 0;
y = 0;
printf("The cosine function will be graphed in the form a*cos(b*x - c) + d");
printf("Enter a value for a:"+"\n");
scanf("%lf", &a);
printf("Enter a value for b:"+"\n");
scanf("%lf", &b);
printf("Enter a value for c:"+"\n");
scanf("%lf", &c);
printf("Enter a value for d:"+"\n");
scanf("%lf", &d);
robot.traceOff();
y = a;
robot.traceOn();
count = 0;
while(count < 25) {
robot.traceColor("#333399", 4);