CBSE Class 12-science Answered
Find the principal value of
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM
Expert Answer
For any x Î [–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 | 04 Jun, 2014, 15:23: PM
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