(48+П²)/(16+П²)
sin²a/cos²a=П²/16
(1-cos²a)/cos²a=П²/16
16-16cos²a=П²cos²a
16=(16+П²)cos²a
cos²a=16/(16+П²)
2cos^2a+1=32/(16+П²)+1=(48+П²)/(16+П²)
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(48+П²)/(16+П²)
sin²a/cos²a=П²/16
(1-cos²a)/cos²a=П²/16
16-16cos²a=П²cos²a
16=(16+П²)cos²a
cos²a=16/(16+П²)
2cos^2a+1=32/(16+П²)+1=(48+П²)/(16+П²)