Oblicz sin22°30'
: 16 gru 2018, 16:51
Oblicz sin22°30'
\(\sin 22°30'=\sin \frac{45°}{2}= \sqrt{ \frac{1-\cos 45}{2} }=\sqrt{ \frac{1- \frac{ \sqrt{2} }{2} }{2} }=\sqrt{ \frac{2- \sqrt{2} }{4} }= \frac{\sqrt{ 2- \sqrt{2} }}{2}\)knzxo pisze:Oblicz sin22°30'