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Trigonometry
hard
0:00.0
If
s
i
n
t
h
e
t
a
=
−
1
\\sin\\theta = -1
s
in
t
h
e
t
a
=
−
1
, find
c
o
s
t
h
e
t
a
\\cos\\theta
cos
t
h
e
t
a
.
A
1
B
0
C
−
1
-1
−
1
D
Undefined
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