cot(θ)=-7/6

解答

cot (θ) = - \frac{7}{6}

θ = 2.43296 \dots + πn

度数

θ = 139.39870 \dots^{\circ} + 18 0^{\circ} n

求解步骤

cot (θ) = - \frac{7}{6}

使用反三角函数性质

cot (θ) = - \frac{7}{6}

cot (θ) = - \frac{7}{6}

的通解

cot (x) = - a \Rightarrow x = arccot (- a) + πn

θ = arccot (- \frac{7}{6}) + πn

θ = arccot (- \frac{7}{6}) + πn

以小数形式表示解

θ = 2.43296 \dots + πn

\frac{2}{π} arccos (m \cdot 1 - 1) = 0

sin (θ) cos (θ) - \frac{1}{2} cos (θ) = 0

cos^{2} (60) + cos^{2} (45) + cos^{2} (x) = 1

3 sin (5 x) = - 1, x < 2 π, 0

3 cos (x) + cos (3 x) = 0