454 ALTERNATING CURRENTS 



, smA a/c a 



17. T = T-T- = v = tan A 

 cos A b/c b 



18. sin 30 =0.5 



19. cos 30 = A/3/2 = 0.866 



20. sin 60 = \/3/2 = 0.866 



21. cos 60 =0.5 



22. tan 30 = l/A/3 = 0.577 



23. tan 60 = V3 = 1 . 732 



24. sin 45 = cos 45 = l/\/2 =0.707 



25. tan 45 =1.0 



