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Answer:
Explanation:
sec
x
−
tan
x
=
1
cos
x
−
sin
x
cos
x
=
1
−
sin
x
cos
x
=
√
(
1
−
sin
x
)
2
√
cos
2
x
=
√
(
1
−
sin
x
)
2
√
1
−
sin
2
x
=
√
(
1
−
sin
x
)
2
1
−
sin
2
x
=
√
(
1
−
sin
x
)
2
(
1
+
sin
x
)
(
1
−
sin
x
)
=
√
1
−
sin
x
1
+
sin
x
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