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"tan"1/2["sin"^(-1)(2x)/(1+x^(2))+"cos"^...

`"tan"1/2["sin"^(-1)(2x)/(1+x^(2))+"cos"^(-1)(1-y^(2))/(1+y^(2))]`

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Express the value of the following in simplest form. "tan"{1/(2)"sin"^(-1)(2x)/(1+x^(2))+1/(2)"cos"^(-1)(1-y^(2))/(1+y^(2))}

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