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Mathematics
Mathematics
Problem
If
cos
θ
=
3
5
\cos \theta = \dfrac{3}{5}
cos
θ
=
5
3
where
θ
\theta
θ
is acute, calculate
sin
3
θ
\sin 3\theta
sin
3
θ
. a)
117
125
\dfrac{117}{125}
125
117
b)
−
117
125
-\dfrac{117}{125}
−
125
117
c)
44
125
\dfrac{44}{125}
125
44
d)
72
125
\dfrac{72}{125}
125
72
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