1+cos/1-cos= (cosec + cot)
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Answered by
0
Answer:
Step-by-step explanation:
Answered by
2
Answer:
We need to prove
1+cosA
1−cosA
=cosecA−cotA
By taking L.H.S. =
1+cosA
1−cosA
=
1+cosA
1−cosA
×
1−cosA
1−cosA
=
1−cos
2
A
(1−cosA)
2
=
sin
2
A
(1−cosA)
2
=
sinA
1−cosA
=
sinA
1
−
sinA
cosA
=cosecA−cotA= R.H.S.
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