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f(x)=cos^(-1)((-2-x^2)/(x^2+2x+2)),then ...

` f(x)=cos^(-1)((-2-x^2)/(x^2+2x+2)),then` (a)`f(-1/2)=2tan^(-1)(1/2)` (b) `f(0)=2tan^(-1)1` (c)`f(1)=2tan^(-1)2` (d) none of these

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RESONANCE DPP ENGLISH-JEE MAINS-All Questions
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