lim (sec 0 - tan 0) = (b) 1 (a) 0 (c)-1 (d) 2

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( lim _{cos pi / 2}(sec theta-tan theta) times frac{(sec theta+tan theta)}{(sec theta+tan theta)} ) ( =frac{L t}{2 pi pi / 2} frac{sec ^{2} theta-tan ^{2} theta}{sec theta+2 cos theta} ) ( =frac{2 t}{infty, pi / 2} frac{1}{sec theta+tan theta} cdot therefore sec pi / 2-3 alpha ) ( Rightarrow ) Ge the

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