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 
.
We know that sin-1 (sin θ) = π – θ, if θ ∈ [π/2, 3π/2] and cos-1 (cos θ) = θ, if θ ∈ [0, π]
Given 
= π
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 .
We know that sin-1 (sin θ) = π – θ, if θ ∈ [π/2, 3π/2] and cos-1 (cos θ) = θ, if θ ∈ [0, π]
Given
= π