cosec A-1/cosec A+1 =(cos A)/1 + sin a
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TO PROVE ;-
⇒ Cosec A - 1 / cosec A + 1 = ( cos A ) / 1 + sin a
PROOF ;-
⇒ ''Here we need to prove that L. H . S is equal to R. H. S''
⇒ Now, first let us go with Left hand side-
With the help of the given identity we need to prove it -
↓
Cosec A + Cot A - { Cosec A + Cot A} { Cosec A - Cot A } / Cot A - Cosec A + 1
⇒ Left Hand Side
⇒ Cosec A + Cot A { 1 - cosec A + cot A } / cot A - cosec A + 1
⇒ Cosec A + Cot A { { 1 - cosec A + cot A } / cot A - cosec A + 1 because it gets cancelled }
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⇒ Right hand side
⇒ 1 +cos A / Sin A [ given }
⇒ 1 sin A cos A / sin A
⇒cosec A + cot A
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Hence R.H.S and L.H.S are same. so hence proved
⇒ Cosec A - 1 / cosec A + 1 = ( cos A ) / 1 + sin a
PROOF ;-
⇒ ''Here we need to prove that L. H . S is equal to R. H. S''
⇒ Now, first let us go with Left hand side-
With the help of the given identity we need to prove it -
↓
Cosec A + Cot A - { Cosec A + Cot A} { Cosec A - Cot A } / Cot A - Cosec A + 1
⇒ Left Hand Side
⇒ Cosec A + Cot A { 1 - cosec A + cot A } / cot A - cosec A + 1
⇒ Cosec A + Cot A { { 1 - cosec A + cot A } / cot A - cosec A + 1 because it gets cancelled }
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⇒ Right hand side
⇒ 1 +cos A / Sin A [ given }
⇒ 1 sin A cos A / sin A
⇒cosec A + cot A
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Hence R.H.S and L.H.S are same. so hence proved
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