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calculati sin 135 grade

Răspuns :

[tex] sin_1_3_5_^{o} = sin_(_1_8_0-_4_5) = sin_4_5= \frac{ \sqrt{2}}{2} . [/tex]
[tex]\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} [/tex]