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If (CosA)/(CosecA+1 )+(CosA)/(CosecA-1)=...

If `(CosA)/(CosecA+1 )+(CosA)/(CosecA-1)=2`, `0^@leAle90^@`, then A is equal to:
यदि `(CosA)/(CosecA+1 ) +(CosA)/(CosecA-1)=2`, `0^@leAle90^@`, तो A का मान ज्ञात करें ।

A

`60^@`

B

`45^@`

C

`90^@`

D

`30^@`

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