July 2022 1 11 Report
Если cos [tex]\alpha[/tex] = -4/5 (дробь) и [tex]\pi[/tex]/2 < [tex]\alpha[/tex] < [tex]\pi[/tex], то sin [tex]\alpha[/tex] =


а) 3/5

b) -3/5

c) +- 3/5

d) 4/5
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