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Adrianaelena0822
a fost răspuns

1 ) Sin30×sin45×cos60×sin0
2) calculati : Sin15=sin(45-30)

Răspuns :

Ionyele
1) 0,38422155
2)0,65028784
Baiatul122001

sin 30°*sin 45°*cos 60°*sin 0°=1/2*√2/2*1/2*0=0

sin 15°=sin(45°-30°)=sin 45°*cos 30°-sin 30°*cos 45°=√2/2*√3/2-1/2*√2/2=√6/4-√2/2=(√6-√2)/4

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