Exercise 5: Finale (20%)

Modify trig4.c as follows, renaming it as trig5.c.

trig5.c should prompt for an angle in degrees, and then print out the sine, cosine and tangent of this angle. The main() function should be structured to invoke functions called deg_cos() and deg_tan() to calculate the cosine and tangent respectively. You will have to add definitions for these functions, similarly to the definition of deg_sin().