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Mathematics
Mathematics
Problem
If
cot
θ
=
3
\cot \theta = 3
cot
θ
=
3
and
sin
θ
<
0
\sin \theta < 0
sin
θ
<
0
, what is
cos
θ
\cos \theta
cos
θ
? a)
−
9
10
-\dfrac{9}{10}
−
10
9
b)
3
10
\dfrac{3}{\sqrt{10}}
10
3
c)
−
1
10
-\dfrac{1}{\sqrt{10}}
−
10
1
d)
−
3
10
-\dfrac{3}{\sqrt{10}}
−
10
3
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