How to write COS, TAN, SIN

[jocdrew21]

I know I need <math.h> and I know how to write tan(10) or whatever I need. However I need angles, like 100 / tan10 = 567.13. The 10 is degrees.

I am doing a fun project now that I feel more confident. However my textbook only shows me how to use the math library and only shows a few trig functions.

I am applying Trigonometric Functions to see if a car is speeding.

[laserlight]

If you are asking how to use those functions to work with degrees, then a solution is to convert the value in degrees to/from radians.

[oogabooga]

Angles must be in radians.

#define PI 3.141592653589793
#define DEG_TO_RAD(d) ((d)*(PI/180.0))

double x = 100.0 / tan(DEG_TO_RAD(10));

But it's more efficient to just work with radians.

[jocdrew21]

Thank you... I got it...