The least value of 6\tan ^{ 2 }{ \phi  } +54\cot ^{ 2 }{ \phi  } | Filo

Class 11

Math

Algebra

Sequences and Series

581
150

The least value of is
(I) when is applicable for
(II) when is applicable for is added further
(III) when

1. (I) is correct, (II) is false
2. (I) and (II) are correct
3. (III) are correct
4. none of the above are correct
Solution:
by applying in we get

Now equality holds when

Hence, the statements I and II are correct.
581
150

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