cos(θ)=-0.7

Lösung

cos (θ) = - 0.7

θ = 2.34619 \dots + 2 πn, θ = - 2.34619 \dots + 2 πn

Grad

θ = 134.42700 \dots^{\circ} + 36 0^{\circ} n, θ = - 134.42700 \dots^{\circ} + 36 0^{\circ} n

Schritte zur Lösung

cos (θ) = - 0.7

Wende die Eigenschaften der Trigonometrie an

cos (θ) = - 0.7

Allgemeine Lösung für

cos (θ) = - 0.7

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

θ = arccos (- 0.7) + 2 πn, θ = - arccos (- 0.7) + 2 πn

θ = arccos (- 0.7) + 2 πn, θ = - arccos (- 0.7) + 2 πn

Zeige Lösungen in Dezimalform

θ = 2.34619 \dots + 2 πn, θ = - 2.34619 \dots + 2 πn

2 cos^{2} (x) + 7 cos (x) + 5 = 0

2 sin (x) = - 1, 0 \leq x < 2 π

sec (3 x) - 4 = 0

6 sin^{2} (θ) + 5 sin (θ) = - 2 sin (θ) - 1

so l v e f or t, x = 5 cos (t)