Q. 3 C5.0( 4 Votes )
Evaluate each of
Firstly, tan = tan ……(i)
Also, coscoscos ……(ii)
From (i) and (ii),
We know that, for any x R, represent an angle in whose tangent is x.
We know that, for any x [-1, 1], represent an angle in whose cosine is x.
Therefore, Principal Value of is 0.
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