Question

aratati ca sin patrat de 135 grade +sin patrat de 45 de grade = 1

Answer 1

$\sin^2(135) + \sin^2(45) = \sin^2(90+45) +\sin^2(45) = \\ \\ = \cos^2(45)+\sin^2(45) = 1$

Answer 2

Răspuns:

sin135°=sin(180-45)°=sin45°=1/√2

Explicație pas cu pas:

atunci

(1/√2)²+(1/√2)²=1/2+1/2=2/2=1