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The value of `"tan"(sin^(-1)("cos"(sin^(-1)x)))"tan"(cos^(-1)(sin(cos^(-1)x))),w h e r ex in (0,1),`is equal to0 (b) 1(c) `-1`(d) none of these |
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Answer» we have `cos(sin^(-1)x)=sqrt(1-x^(2)) and sin cos^(-1)x=sqrt(1-x^(2))` `therefore tan{sin^(-1)(cos sin^(-1)x)}tan{cos^(-12)(sin(cos^(-1)x)}` `=tan{sin^(-1)sqrt(1-x^(2))}tan{cos^(-1)sqrt(1-x^(2))` `=tan(sin^(-1)sqrt(1-x^(2))tan{(pi)/(2)-sin^(-1)sqrt(1-x^(2))=1` `=tan(sin^(-1)sqrt(1-x^(2))cot(sin^(-1))sqrt(1-x^(2))=1` |
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