90
18
6
2
Because 90 degrees is half of a straight line. A straight line is equal to 180 degrees. 180 divided by 2 = 90.
180 ÷ 40 = 4.5 Or 4 remainder 20
22.5
18
180
18
0.03125
180 / 3 / 2 / 1 = 30
6
2
Because 90 degrees is half of a straight line. A straight line is equal to 180 degrees. 180 divided by 2 = 90.
180 ÷ 40 = 4.5 Or 4 remainder 20
60,60,60 Because 180 divided by 3 is 60 60x3= 180
The value of sec 180 degrees is equal to 1 divided by the cosine of 180 degrees. Since the cosine of 180 degrees is -1, sec 180 equals -1. Therefore, sec 180° = -1.