Patrick B. answered 12/03/20
Tutor
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Math and computer tutor/teacher
the angle is 180+inverse_sin(-0.841) = 180 + 57.245868283932239117910970210539 = 237.245868283932239117910970210539
the sine of half that angle is 0.8777912960971985315476728010016
Osama A.
Thank you so much that was so helpful12/03/20