Find the principal values of each of the following:
sec–1(2)
Let sec–1(2) = y
⇒ sec y = 2
⇒ sec(
)
The range of principal value of sec–1is [0, π]–{
}
And sec
= 2
∴ The principal value of sec–1(2) is 
.
1
Find the principal values of each of the following:
sec–1(2)
Let sec–1(2) = y
⇒ sec y = 2
⇒ sec()
The range of principal value of sec–1is [0, π]–{}
And sec = 2
∴ The principal value of sec–1(2) is .