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Mathematics
Mathematics
Problem
If
θ
\theta
θ
lies in the second quadrant and
sin
θ
=
3
5
\sin \theta=\dfrac{3}{5}
sin
θ
=
5
3
, what is the sign of
cos
2
θ
\cos 2\theta
cos
2
θ
? a) Negative b) Positive c) Zero d) Cannot be determined
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