Answer each of the following questions in one word or one sentence or as per exact requirement of the question:
Write the principal value of 
.
Given tan-1 (1) + cos-1 (-1/2)
We know that cos-1 (-θ) = π – cos-1 θ
1
Answer each of the following questions in one word or one sentence or as per exact requirement of the question:
Write the principal value of .
Given tan-1 (1) + cos-1 (-1/2)
We know that cos-1 (-θ) = π – cos-1 θ