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`(d)/(dx)cos^(-1)sqrt(cosx),0ltxlt(pi)/(2)` is equal toA. `(1)/(2)sqrt(1+sec x)`B. `sqrt(1+sec x)`C. `-(1)/(2)sqrt(1+sec x)`D. `-sqrt(1+sec x)` |
Answer» `(d)/(dx)cos^(-1)sqrt(cos x)=(sin x)/(2sqrt(cos x)sqrt(1-cos x))` `=(sqrt(1- cos^(2)x))/(2sqrt(cos x)sqrt(1-cos x))=(1)/(2)sqrt((1+cos x)/(cos x))` |
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