Q43 of 55 Page 35

Fill in the blanks

The value of is ________.

The value of is


We need,


Principal value of cos-1 x is [0,π]


Also, cos (2nπ + θ) = cos θ for all n Є N




So,



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41

Fill in the blanks

The set of values of is _________.

 42

Fill in the blanks

The principal value of tan–1 √3 is _________.

 44

Fill in the blanks

The value of cos (sin–1 x + cos–1 x), |x| ≤ 1 is ________.

 45

Fill in the blanks

The value of expression when is_______.