Question

if cos = -0.7500, what are all the possivle values of Ө between 0 degrees and 360 degrees, rounded to the nearest degree?
a.) 139 and 199
b.) 139 and 212
c.) 139 and 290
d.) 139 and 221

Answer 1

yessss

Answer 2

It would lie in Quadrant II and III, 139, 221

Answer 3

well, you just take your calculator, and type inverse cosine of -0.7500, this gives you a 1st answer, then you use cosine property in the trigonometric circle