9/15
Объяснение:
Sin a=√1-cos^2 a =√1-(12/15)^2=√1-144/225 =√225/225-144/225=√81/225=9/15
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9/15
Объяснение:
Sin a=√1-cos^2 a =√1-(12/15)^2=√1-144/225 =√225/225-144/225=√81/225=9/15