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Evaluate pi 2 sec2 x - tan2x dx - JAMB Mathematics 1998 Question

Evaluate ∫2π(sec2 x - tan2x)dx
A
π2
B
π - 2
C
π3
D
π + 2
correct option: b

∫(^{\pi}_{2})(sec2 x - tan2x)dx

∫(^{\pi}{2}) dx = [X](^{\pi}{2})

= (\pi) - 2 + c

when c is an arbitrary constant of integration

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