(a)
\
to
is quadrant I.
to
is quadrant II.
to
is quadrant III.
to
is quadrant IV.
The angle is
.
Just compare the fraction with the
to the fractions.
The fraction
is between 0 and
.
Thus,
is in quadrant I.
(b)
\The angle is
.
Just compare the fraction with the
to the fractions
The fraction
is between 1 and
.
Thus,
is in quadrant III.
(a) The angle
is in quadrant I.
(b) The angle
is in quadrant III.