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Value of x satisfying ` tan(sec^(- 1)x)=sin(cos^(- 1)(1/(sqrt(5))))`A. `pm sqrt(5)/(3)`B. `pm (3)/sqrt(5)`C. `pm sqrt(3)/(5)`D. `pm 3/5` |
Answer» We have `tan(sec^(-1)x)=sin(cos^(-1)(1)/sqrt(5))` `rarr sqrt(sec^(2)(sec^(-1)x)-1)=sin(sin^(-1))(2)/sqrt(5)` `rarr sqrt(x^(-1))=(2)/sqrt(5)rarrx=pm (3)/sqrt(5)` |
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