Answer each of the following questions in one word or one sentence or as per exact requirement of the question:
Find the value of 
.
Given tan-1 (tan 9π/8)
= tan-1 [tan (π + π/8)]
= tan-1 (tan π/8)
= π/8
∴ tan-1 (tan 9π/8) = π/8
1
Answer each of the following questions in one word or one sentence or as per exact requirement of the question:
Find the value of .
Given tan-1 (tan 9π/8)
= tan-1 [tan (π + π/8)]
= tan-1 (tan π/8)
= π/8
∴ tan-1 (tan 9π/8) = π/8