Question

solve the equation cosx=(-1/2) if 0 degrees < (or equal to) x< ( or equal to) 360 degrees
a) 135 degrees, 225 degrees
b) 210 degrees,330 degrees
c) 150 degrees, 210 degrees
d) 120 degrees, 240 degrees

Answer 1

take inverse cosine. x = 60 or 300

Answer 2

i pluged it in the calculator and i got an erro

Answer 3

oops, it didn't see it's negative 1/2

Answer 4

it's 120 and 240

Answer 5

thakns alot mane