cos(x)= 8/21

Lösung

cos (x) = \frac{8}{21}

x = 1.17997 \dots + 2 πn, x = 2 π - 1.17997 \dots + 2 πn

Grad

x = 67.60731 \dots^{\circ} + 36 0^{\circ} n, x = 292.39268 \dots^{\circ} + 36 0^{\circ} n

Schritte zur Lösung

cos (x) = \frac{8}{21}

Wende die Eigenschaften der Trigonometrie an

cos (x) = \frac{8}{21}

Allgemeine Lösung für

cos (x) = \frac{8}{21}

cos (x) = a \Rightarrow x = arccos (a) + 2 πn, x = 2 π - arccos (a) + 2 πn

x = arccos (\frac{8}{21}) + 2 πn, x = 2 π - arccos (\frac{8}{21}) + 2 πn

x = arccos (\frac{8}{21}) + 2 πn, x = 2 π - arccos (\frac{8}{21}) + 2 πn

Zeige Lösungen in Dezimalform

x = 1.17997 \dots + 2 πn, x = 2 π - 1.17997 \dots + 2 πn

2 cos^{2} (x) - 2 cos (x) - 1 = 0

sin (b) = \frac{1}{3}

35 + 53 sin (2 T - 31.9) = 0

cos (2 x) = - 12

sin (x) = \frac{1}{3}, cos (x)