Trigonometric EquationHard
Question
In =
tann x dx then 
n [In + In-2] equals
tann x dx then n [In + In-2] equalsOptions
A.
B.1
C.∞
D.zero
Solution
tann x(1 + tan2 x)dx =tann x sec2 xdx =
tndt where t = tan x In + In + 2 =
; ⇒ 
n[In + In+2] = 
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