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Example 20. (i) In a AABC, find the maxima and minima of u = sin A sin B sin C where A + B + C = T (ii) In a plane triangle ABC, find the maximum value of cosA cosB cosC.

Example 20. (i) In a AABC, find the maxima and minima of u = sin A sin B sin C
where A + B + C = T
(ii) In a plane triangle ABC, find the maximum value of cosA cosB cosC.

Grade:12th pass

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