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Which of the following is not true ?A. `sin cos^(-1)tan cot^(-1)x=sqrt(1-(1)/(x^(2)))`B. `cos tan^(-1)cot sin^(-1)x = x`C. `tan cot^(-1)sin cos^(-1)x = (1)/(sqrt(1-x^(2)))`D. `cot sin^(-1)cos tan^(-1)x=sqrt(1-x^(2))` |
Answer» Correct Answer - D (a) `sin cos^(-1)tan cot^(-1)x=sin "cos"^(-1)(1)/(x)=sqrt(1-(1)/(x^(2)))` (b) `cos tan^(-1)cot sin^(-1)x = "cos tan"^(-1)(sqrt(1-x^(2)))/(x)=x` (c ) `tan cot^(-1)sin cos^(-1)x=tan cot^(-1) sqrt(1-x^(2))=(1)/(sqrt(1-x^(2)))` (d) `cot sin^(-1)cos tan^(-1)x="cot sin"^(-1)(1)/(sqrt(1+x^(2)))=x` |
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