cos(20)cos(30)+sin(20)sin(30)

Lösung

cos (2 0^{\circ}) cos (3 0^{\circ}) + sin (2 0^{\circ}) sin (3 0^{\circ})

0.98480 \dots

Schritte zur Lösung

cos (2 0^{\circ}) cos (3 0^{\circ}) + sin (2 0^{\circ}) sin (3 0^{\circ})

Vereinfache zur Dezimalform

= 0.98480 \dots

\frac{1 - sin ( 3 5 ^{\circ} )}{1 + sin ( 3 5 ^{\circ} )}

cos (\frac{- 11 π}{2})

sin (2 (\frac{5 π}{6})) - \frac{5 π}{6}

sin (35.2 6^{\circ})

3.1 sin (4 5^{\circ})