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Mathematics
Mathematics
Problem
If
x
=
sec
θ
−
tan
θ
x = \sec \theta - \tan \theta
x
=
sec
θ
−
tan
θ
and
y
=
csc
θ
+
cot
θ
y = \csc \theta + \cot \theta
y
=
csc
θ
+
cot
θ
, then prove that
x
y
+
1
=
y
−
x
xy + 1 = y - x
x
y
+
1
=
y
−
x
.
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