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Mathematics
Mathematics
Problem
Show that
(
1
+
sin
θ
)
(
1
−
sin
θ
)
=
cos
2
θ
(1+\sin\theta)(1-\sin\theta)=\cos^{2}\theta
(
1
+
sin
θ
)
(
1
−
sin
θ
)
=
cos
2
θ
for any acute angle
θ
\theta
θ
.
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