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cos^(-1)((1-x^(2))/(1+x^(2)))...

`cos^(-1)((1-x^(2))/(1+x^(2)))`

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To solve the problem \( y = \cos^{-1}\left(\frac{1 - x^2}{1 + x^2}\right) \), we will follow these steps: ### Step 1: Rewrite the expression using trigonometric identities We know from trigonometric identities that: \[ \cos(2\theta) = \frac{1 - \tan^2(\theta)}{1 + \tan^2(\theta)} \] This means we can set: ...
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