2sin(2/5)cos((sqrt(21))/5)

Lösung

2 sin (\frac{2}{5}) cos (\frac{21}{5})

0.47399 \dots

Schritte zur Lösung

2 sin (\frac{2}{5}) cos (\frac{21}{5})

Vereinfache zur Dezimalform

= 0.47399 \dots

(sin (6 0^{\circ}) + cos (6 0^{\circ}))^{2}

100 \cdot sin (1 5^{\circ})

arctan (\frac{2.5}{4})

cos (\frac{2 π}{3}) - arctan (1)

cot (arccos (- \frac{2}{5}))