prove that : sinx/1+cosx=tanx/2
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Answer:
Proof
Explanation:
We have
sin
(
x
)
1
+
cos
(
x
)
Using that
sin
(
x
)
=
2
sin
(
x
2
)
⋅
cos
(
x
2
)
and
cos
(
x
)
=
2
cos
2
(
x
2
)
−
1
then
2
sin
(
x
2
)
cos
(
x
2
)
2
cos
2
(
x
2
)
−
1
+
1
=
tan
(
x
2
)
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