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Mathematics
Mathematics
Problem
For an acute angle
θ
\theta
θ
, if
2
sin
θ
=
cos
θ
2\sin \theta=\cos \theta
2
sin
θ
=
cos
θ
, determine
sin
θ
\sin \theta
sin
θ
. a)
2
5
\dfrac{2}{\sqrt5}
5
2
b)
1
2
\dfrac12
2
1
c)
1
5
\dfrac{1}{\sqrt5}
5
1
d)
2
5
\sqrt{\dfrac{2}{5}}
5
2
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