45 degrees in quadrant 1 or 4
45 degrees = pi/4
-9 (pi/4) is -pi/4 which is 45 degrees in Q 4
Which value for x is a solution to cosx = sqrt of 2/2?
a) -9pi/4
b) 3pi/4
c) -3pi/4
d) 4pi/3
What is the first step I should do?
1 answer