Find the principal value  of

Asked by Topperlearning User | 4th Jun, 2014, 01:23: 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  | 4th Jun, 2014, 03:23: PM