Question

ABC triunghi dreptunghic, masura unghiului A=90° ,AB=12cm,tgB=1. Aflati: perimetrul,cosB,sinC,ctgB,tgC=?

Answer 1

tg.B=ac/ab=1⇒ac=12
bc²=ab²+ac²⇒bc=12√2
P=12(2+√2)
cos.b=ab/bc=√2
sin.c=ab/bc=√2
ctg.b=ab/ac=1
tg.c=ac/ab=1