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Question

Differentiate-
Sq.rt of (Sec x + tan x)
----------------------------
Sq rtof ( Sec x - Tan x )

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Solution

secx+tanxsecx-tanxRationalising the denominator we getsecx+tanxsecx-tanx×secx+tanxsecx+tanx=secx+tanxsecx-tanxsecx+tanx=secx+tanxsec2x-tan2x=secx+tanx1 sec2x=1+tan2x=secx+tanxddxsecx+tanx=secx tanx+sec2x

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