1/sec a-1 + 1/sec a + 1= cosec²a
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Answer:
Answer
secA+1
secA−1
=
1+cosA
1−cosA
L.H.S:
secA+1
secA−1
=
cosA
1
+1
cosA
1
−1
=
cosA
1+cosA
cosA
1−cosA
=
1+cosA
1−cosA
=R.H.S.
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