Mathematics, 30.01.2020 15:45, cdradlet2001

Find sin (a-b) if sin a = 4/5 with a between 90 and 180 and if cos b = 3/5 with b between 0 and 90

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Find sin (a-b) if sin a = 4/5 with a between 90 and 180 and if cos b = 3/5 with b between 0 and 90...