cos(θ)=-0.2

Lösung

cos (θ) = - 0.2

θ = 1.77215 \dots + 2 πn, θ = - 1.77215 \dots + 2 πn

Grad

θ = 101.53695 \dots^{\circ} + 36 0^{\circ} n, θ = - 101.53695 \dots^{\circ} + 36 0^{\circ} n

Schritte zur Lösung

cos (θ) = - 0.2

Wende die Eigenschaften der Trigonometrie an

cos (θ) = - 0.2

Allgemeine Lösung für

cos (θ) = - 0.2

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

θ = arccos (- 0.2) + 2 πn, θ = - arccos (- 0.2) + 2 πn

θ = arccos (- 0.2) + 2 πn, θ = - arccos (- 0.2) + 2 πn

Zeige Lösungen in Dezimalform

θ = 1.77215 \dots + 2 πn, θ = - 1.77215 \dots + 2 πn

sin^{2} (x) - 5 cos (x) = 3

cos (x) = - \frac{9}{41}

cos (θ) = - 0.42, 0^{\circ} \leq θ < 36 0^{\circ}

sin (2 x) = \frac{1}{2}, 0 < x < 2 π

4 sin^{2} (θ) + 2 cos (θ) = 3