Can't calculate angle a, when 𝑠𝑖𝑛(𝑎)=2.
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Daniel Pollard on 15 Apr 2021
If a is a real number, then sin(a) must be between -1 and 1. Calling
1.5708 - 1.3170i
which is a complex number, so can't really represent an actual angle. Have a look at plots of sin and cos; they never go below -1 and never go above 1.