sin86°17′/cos86°17′=tan86°17′=15.39
cos63°×tan63°-sin63°=sin63-sin63=0
tan19°×tan27°×tan32°×tan58°×tan63°×tan71°
=tan19°×tan27°×tan32°×cot32°×cot27°×cot19°=1
sin86°17′/cos86°17′=tan86°17′=15.39
cos63°×tan63°-sin63°=sin63-sin63=0
tan19°×tan27°×tan32°×tan58°×tan63°×tan71°
=tan19°×tan27°×tan32°×cot32°×cot27°×cot19°=1