The most straightforward way to obtain the expression for cos(2x) is by using the cosine of the sum formula cos(x y) = cosx*cosy sinx*siny T...
Integration of 1/sec^2x tan^2x 254108-Integrate tanx sec^2x/1-tan^2x
I got $\ln\sec(2x 1) \tan(2x1) \text C$ as an answer I saw that the integral of $\sec x$ is $\ln\sec x \tan x \text C$ But I feel I may have...
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