If y = sec (tan ⁻¹x), then dy/dx at x=1 is equal to:

Limit, Continuity and Differentiability: JEE Main 2013 Mathematics question

JEE Main 2013 · Session, Shift 1 · Q3675

JEE Main 2013Session, Shift 1MathematicsMediumLimit, Continuity and Differentiability420× since 2002

y = \sec \left( {{{\tan }^{ - 1}}x} \right),

then

{{{dy} \over {dx}}}

x=1

is equal to :

JEE Main 2013 · Session, Shift 1 · Q3675

JEE Main 2013Session, Shift 1MathematicsMediumLimit, Continuity and Differentiability420× since 2002

y = \sec \left( {{{\tan }^{ - 1}}x} \right),

then

{{{dy} \over {dx}}}

x=1

is equal to :