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Mathematics
Mathematics
Problem
If
sin
θ
=
3
5
\sin \theta = \dfrac{3}{5}
sin
θ
=
5
3
for an acute angle
θ
\theta
θ
, find the value of
cos
(
90
∘
−
θ
)
\cos(90^\circ - \theta)
cos
(
9
0
∘
−
θ
)
. Give a brief reason for your answer.
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