arcsin(-2/3) =-41.810315
45-arcsin(-2/3) = 86.810315
sin(86.810315)=.998451
Bobo B.
asked 04/12/19find sin a
sin(45-a)=-2/3
pi/4 < a < pi/2
arcsin(-2/3) =-41.810315
45-arcsin(-2/3) = 86.810315
sin(86.810315)=.998451
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