Question

URGENTTTTTT
DAU COROANA

Answer 1

Salut,

^ insemna la puterea

4S=a^2sin2B

4S=a^2×2sinBcosB

4S=a^2×2×b/2R×(c^2+a^2-b^2)/2ca

4S=[ab(c^2+a^2-b^2)]/2cR

4S=[ab(c^2+a^2-b^2)]/(2c×abc/4S)

4S=[4S(c^2+a^2-b^2)]/2c^2

2c^2=c^2+a^2-b^2

a^2=b^2+c^2

=> triunghiul.este.dreptunghic

conform.teorema.inversa,Pitagora

Spor!