Question

calculati sin 135 grade

Answer 1

$sin_1_3_5_^{o} = sin_(_1_8_0-_4_5) = sin_4_5= \frac{ \sqrt{2}}{2} .$

Answer 2

$\boxed{ Ne folosim de formula: \quad sin (180^o - x) = sin x}\\ \\ sin 135^o = sin (180^o-45^o) = sin 45^o = \dfrac{\sqrt2}{2}$