How do you calculate sin270 + sec480?
1 Answer
Jun 8, 2015
sin 270 = - 1
sec 480 = 1/cos 480
cos 480 = cos (120 + 360) = - cos 60 = - 1/2
sec 480 = -2
sin 270 + sec 480 = -1 - 2 = -3