An angle of pi/2 radians can be transformed into degrees
using the conversion formula (180/pi):
φ =
(pi / 2) * (180 / pi) = 90˚
Therefore an angle of pi/2 rad is just equivalent to 90˚.
Since 90<span>˚ is located on the y-axis, therefore the horizontal component x is
zero. So cosine of this angle is zero.</span>
The answer is 2/9 in lowest terms.
In decimal form its 0.222222
There’s no pictures what shape
If you put it in slope intercept form, you will have:

.
If you converted the format, you could also have:

.
The rest of the choices are a different graph.
I think the answer is 2010