Question

prove sin150+cos300-tan315+sec3660=4​

Answer 1

Answer:

sin 150 = sin(90+60) = cos 60 = 1/2

cos 300 = cos (360-60) = cos60 =1/2

tan315= tan(360-45) = -tan 45 = -1

sec3660 = sec (360×10 + 60) = sec60 =2

If you put all the values, you get

(1/2) + (1/2) - (-1) + 2 =4