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`If-(pi)/(2)lt0lt(pi)/(2),` then the minimum value of `cos^(3)theta+sec^(3)thets` isA. 1B. 2C. 0D. none of these. |
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Answer» Correct Answer - B We know that `A.M.geG.M.` `:." "(cos^(3)theta+sec^(3)theta)/(2)gesqrt(cos^(3)thetaxxsec^(3)theta)` `implies" "cos^(3)theta+sec^(3)thetage2`. Hence, the minimum value of `cos^(3)theta+sec^(3)theta" is "2.` |
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