Find the principal value  of

Asked by Topperlearning User | 21st Apr, 2016, 12:46: PM

Expert Answer:

For any element of [-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  | 21st Apr, 2016, 02:46: PM