=
/2
+
=
/2
Cotés :
a = c· sin
= c· cos
b = c· sin
= c· cos
a = b· tan
= b· cotan
b = a· tan
= a· cotan
Hypoténuse :
c = a / sin
= a / cos
= b / sin
= b / cos
= 
/2
+ 
= /2 = /2 + = /2 = c· cos = c· cos = a / cos
= b / cos