Electronics and Communication Engineering - Exam Questions Papers - Discussion

3. 

The equation sin (z) = 10 has

[A]. no real or complex solution
[B]. exactly two distinct complex solutions
[C]. a unique solution
[D]. an infinite number of complex solutions

Answer: Option A

Explanation:

Since value lies between - 1 and + 1. Therefore no real or complex solution exists.


Vanamali said: (Apr 1, 2015)  
Given answer is wrong. Z = 1.5708 - 2.9932i yields sin(z) = 10.

Bemish said: (Jan 12, 2019)  
Here sin(Z) is unbounded in the complex plane.

Shiv Sagar said: (Aug 27, 2020)  
Answer: (x=(2n+1)x(pi/2),y=+/-(2.993)). So it should be (D) i.e. an infinite number of complex solutions.

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