solvefor x,cos(x)= 1/3

Lösung

löse nach

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

x = 1.23095 \dots + 2 πn, x = 2 π - 1.23095 \dots + 2 πn

Grad

x = 70.52877 \dots^{\circ} + 36 0^{\circ} n, x = 289.47122 \dots^{\circ} + 36 0^{\circ} n

Schritte zur Lösung

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

Wende die Eigenschaften der Trigonometrie an

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

Allgemeine Lösung für

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

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

x = arccos (\frac{1}{3}) + 2 πn, x = 2 π - arccos (\frac{1}{3}) + 2 πn

x = arccos (\frac{1}{3}) + 2 πn, x = 2 π - arccos (\frac{1}{3}) + 2 πn

Zeige Lösungen in Dezimalform

x = 1.23095 \dots + 2 πn, x = 2 π - 1.23095 \dots + 2 πn

cos (θ) = - 0.02

cos^{2} (2 x) = 3 cos (2 x)

cos (θ) = - 0.42

sin (\frac{θ}{2}) + cos (θ) = 1

3 sin (\frac{π}{5} x) = 2