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Mathematics
Mathematics
Problem
Given
cos
θ
=
3
2
\cos \theta=\dfrac{\sqrt3}{2}
cos
θ
=
2
3
for an acute angle
θ
\theta
θ
, find
sin
2
θ
\sin^2\theta
sin
2
θ
. a)
1
2
\dfrac12
2
1
b)
3
4
\dfrac{\sqrt3}{4}
4
3
c)
1
4
\dfrac14
4
1
d)
3
4
\dfrac34
4
3
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