1.

Integrate the following functions: (1-cosx)/(1+cosx)

Answer»

SOLUTION :`(1-cosx)/(1+cosx) = (2 sin^2(x/2))/(2 cos^2(x/2))`
= `tan^2(x/2) = sec^2(x/2)-1`
THEREFORE` int(1-cosx)/(1+cosx) DX = (tanx/2)/(1/2)-x+c`
`x+c-=2tan(x/2)`


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