456 



ALTERNATING CURRENTS 



90 180 270 360 

 Graphic Representation of Trigonometric Functions. 



26. 

 27. 

 28. 

 29. 

 30. 

 31. 



sin (90 + x 

 cos (90 + x 

 tan (90 + x 

 sin (180 - x) 

 cos (180 - x) 

 tan (180 - x) 



= COS X 



= sin x 

 = cot x 

 = sin x 

 = cos x 

 = tan x 



1 



