cos(x)=(-4)/5

Lösung

cos (x) = \frac{- 4}{5}

x = 2.49809 \dots + 2 πn, x = - 2.49809 \dots + 2 πn

Grad

x = 143.13010 \dots^{\circ} + 36 0^{\circ} n, x = - 143.13010 \dots^{\circ} + 36 0^{\circ} n

Schritte zur Lösung

cos (x) = \frac{- 4}{5}

Wende Bruchregel an:

\frac{- a}{b} = - \frac{a}{b}

cos (x) = - \frac{4}{5}

Wende die Eigenschaften der Trigonometrie an

cos (x) = - \frac{4}{5}

Allgemeine Lösung für

cos (x) = - \frac{4}{5}

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

x = arccos (- \frac{4}{5}) + 2 πn, x = - arccos (- \frac{4}{5}) + 2 πn

x = arccos (- \frac{4}{5}) + 2 πn, x = - arccos (- \frac{4}{5}) + 2 πn

Zeige Lösungen in Dezimalform

x = 2.49809 \dots + 2 πn, x = - 2.49809 \dots + 2 πn

3 cot (\frac{3}{2}) + 2 csc (\frac{x}{2}) = 0, 0^{\circ} \leq, x \leq 36 0^{\circ}

cos (x) = 2 cos (4 5^{\circ} + x)

2 sin (θ) = 1.124

cos (θ) = - 0.11

tan (θ) = \frac{2}{2}