Complex Numbers And Quadratic Equations question 299

Question: The value of $ \sec h(i\pi ) $ is [RPET 1999]

Options:

A) - 1

B) i

C) 0

D) 1

Show Answer

Answer:

Correct Answer: A

Solution:

$ \sec h(i\pi ) $ $ =\sec (i^{2}\pi ) $ $ =\sec (-\pi ) $ $ =\sec \pi =-1 $ .