cos(θ)=-(sqrt(7))/5

Lösung

cos (θ) = - \frac{7}{5}

θ = 2.12839 \dots + 2 πn, θ = - 2.12839 \dots + 2 πn

Grad

θ = 121.94805 \dots^{\circ} + 36 0^{\circ} n, θ = - 121.94805 \dots^{\circ} + 36 0^{\circ} n

Schritte zur Lösung

cos (θ) = - \frac{7}{5}

Wende die Eigenschaften der Trigonometrie an

cos (θ) = - \frac{7}{5}

Allgemeine Lösung für

cos (θ) = - \frac{7}{5}

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

θ = arccos (- \frac{7}{5}) + 2 πn, θ = - arccos (- \frac{7}{5}) + 2 πn

θ = arccos (- \frac{7}{5}) + 2 πn, θ = - arccos (- \frac{7}{5}) + 2 πn

Zeige Lösungen in Dezimalform

θ = 2.12839 \dots + 2 πn, θ = - 2.12839 \dots + 2 πn

sin (π + x) = sin (x)

cos (x) = - \frac{2}{π}

5 sin (x) = - 3

csc^{2} (x) = 2 \cdot cot^{2} (x)

3 sin (2 x) = cos (2 x)