Prove that root 1 + sin A / 1 -- sin A = sec A + tan A
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Answer
L.H.S
=
1−sinA
1+sinA
=
1−sinA
1+sinA
×
1+sinA
1+sinA
=
1−sin
2
A
(1+sinA)
2
=
cos
2
A
(1+sinA)
2
=
cosA
1+sinA
=
cosA
1+sinA
=
cosA
1
+
cosA
sinA
=secA+tanA=R.H.S→Hence Proved
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