Name:
Unit
Circle
Worksheet
1.
What
is
the
unit.circle?
.
2.
Explain
how
to
find
the
exact
value
of
cos
390‘;
without
using
a
calculator.
3.
Explain
how
to
find
the
exact
value
of
sin
300°
without
using
a
calculator.
_
In 4-9,
true
or
false.
Do
not
use
a
calculator.
4,
sin
390°
=
sin
30°
‘
7.
cos
540°
=
cos
180°
5
-sin
300°
=
-sin
60°
8.
cos
210°
=
cos
30°
6.
sin240°
=
-sin
60°
9.
cos300°
=
-cos
60°
In
10-17,
for
the
indicated
point,
tell
if
the
value
for
sin
@
or
cos
8
is
positive,
negative,
or
neither.
1
I
D
B
10.
A,
cos
@
14.
E,
cos
@
-1
i,
11.
B,
sin
@
1.
F,
cos
@
E
.
A
12.
C,
sin
8
16.
G,
cos
6
.
13.
D,
cos
@
_
17.
H,
sin
8
M
In
18-25,
refer
to
the
diagram
at
the
right.
Give
the
letter
that
could
‘'stand
for
the
function
value.
18.
cos
180°
22.
sin720°
(g,
h)
|
(c,
19.
sin
270°
23.
cos
398°
P
.
,
|
@
j)
(a,
b)
20.
sin
38°
.
24,
cos
250°
21.
cos310°
.25,
sin450°
k,
)
(©p)
(m,
n
v
d
b
