The calculator will find the hyperbolic cosecant of the given value.
The hyperbolic cosecant y=csch(x) is such a function that y=sinh(x)1=ex−e−x2.
The domain of the hyperbolic cosecant is (−∞,0)∪(0,∞), the range is (−∞,0)∪(0,∞).
It is an odd function.
Related calculator:
Inverse Hyperbolic Cosecant Calculator
Answer
csch(−21)=−csch(21)≈−1.919034751334944A
For graph, see the graphing calculator.