1.

सिद्ध कीजिए ` cos^(-1){cos""(-(pi)/(3))} ne -(pi)/(3)` | इसका मान क्या है ?

Answer» Correct Answer - `(pi)/(3)`
` cos^(-1)[cos(-(pi)/(3))]=cos^(-1)[cos""(pi)/(3)]=(pi)/(3)`


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