cos(x)=-4/7

Lösung

cos (x) = - \frac{4}{7}

x = 2.17904 \dots + 2 πn, x = - 2.17904 \dots + 2 πn

Grad

x = 124.84990 \dots^{\circ} + 36 0^{\circ} n, x = - 124.84990 \dots^{\circ} + 36 0^{\circ} n

Schritte zur Lösung

cos (x) = - \frac{4}{7}

Wende die Eigenschaften der Trigonometrie an

cos (x) = - \frac{4}{7}

Allgemeine Lösung für

cos (x) = - \frac{4}{7}

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

x = arccos (- \frac{4}{7}) + 2 πn, x = - arccos (- \frac{4}{7}) + 2 πn

x = arccos (- \frac{4}{7}) + 2 πn, x = - arccos (- \frac{4}{7}) + 2 πn

Zeige Lösungen in Dezimalform

x = 2.17904 \dots + 2 πn, x = - 2.17904 \dots + 2 πn

(8 cos (θ) - 4) (5 sin (θ) - 5) = 0

arctan (x) = \frac{π}{3}

2 cos (2 x) - 2 sin (x) = 0

cos (2 x) + 3 cos (x) - 1 = 0

cos (2 θ) = - 1