CBSE Class 12-science Answered
Find the principal value of 
Asked by Topperlearning User | 21 Apr, 2016, 12:46: PM
Expert Answer
For any x 
[-1, 1], cos-1 x represents an angle in [0, p] whose cosine is x.
therefore
= An angle in [0, p] whose cosine is 
=
Answered by | 21 Apr, 2016, 02:46: PM
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