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1/(1+sinA) + 1/(1-sinA) = 2sec^2 A...

`1/(1+sinA) + 1/(1-sinA) = 2sec^2 A`

Text Solution

Verified by Experts

L.H.S
`1/(1+sinA) + 1/(1-sinA) `
=`(1-sinA+1+sinA)/((1+sinA)(1-sinA)`
=`2/(1-sin^2A)`
=`2/cos^2A`
`2sec^2 A`=R.H.S
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