1.

निम्नलिखित के मुख्य मान ज्ञात कीजिए। (i) `sin^(-1)""(1)/(2)` (ii) `tan^(-1)""(1)/(sqrt3)` (iii) `cot^(-1)(-sqrt3)`

Answer» (i) `sin^(-1)""(1)/(2)=sin^(-1)""(sin""(pi)/(6))=(pi)/(6)`
(ii) `tan^(-1)""(1)/(sqrt3)=tan^(-1)(tan""(pi)/(6))=(pi)/(6)`
(iii) `cot^(-1)(sqrt-3)=pi-cot^(-1)(sqrt3)=pi-cot^(-1)(cot""(pi)/(6))=pi-(pi)/(6)=(5pi)/(6)`


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