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Mathematics
Mathematics
Problem
Given that
cos
θ
=
3
2
\cos\theta=\dfrac{\sqrt{3}}{2}
cos
θ
=
2
3
for an acute angle
θ
\theta
θ
, calculate
sin
2
θ
−
cos
2
θ
\sin^{2}\theta-\cos^{2}\theta
sin
2
θ
−
cos
2
θ
.
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