DISQUISICIONES TRIGONOMÉTRICAS ;J 'H 



o i /o j^ 



veis. 150' = ^,' ; cov. 150° = - 



4 4 



subv. 150° = 



l- 1 3 

 1 + cos 150- L' v ' 2— v 3. 



) 



2 2.4 



1 

 1+ sen 150 ^~2 3 



Sllbco V. 1. >0 =- - = — =-• 



2 2 4 



36. Arco de 180°. 



sen 180 c = 0; COSl80° = — 1 



sen v. 180 o — 1 — eos 180° = 2; eos y. 180 3 = 1 — sen 180°=1 



2 1 



veis. 180° = -=! cov. 1 so ■ = - 



2 — 



1 + cos 180° 1 — 1 , 

 subv. 180° = — !- -=— -— =0; 



l+senl80° 1+0 1 

 subcov. 180° = - — -=-!-=-. 



Arco de 270°. 



sen 270° = — 1. eos 270 " = 



sen v. 270° = 1 — cos270° = l; 



cosen v. 270= 1 — sen 270 ■= 1 — (— 1)=2 



vers. 270° = - cov. 270° = 1 



_ 



, „„ 1 + cos 270° 1. 



subv. 270° =— ■ — — = - , 



2 2 



l + sen270° 1 — 1 

 subcov. 270°=- - = - -=0. 



2 2 



38. Arco de 360°. 



sen300° = eos 360° = 1 



sen v. 300 " = 1 — eos 360 °= 1 — 1 = ; 

 eos v. 360 °= 1 — sen 360 ° =1 — = 1 



ver. 300° = (» cov. 360° = - 



l+cos360 1 + 1 

 subv. 360°=- -=— 5— = 1; 



2 2 



