tan(x)=-sqrt(2)+1

解答

tan (x) = - 2 + 1

x = - 0.39269 \dots + πn

度数

x = - 22. 5^{\circ} + 18 0^{\circ} n

求解步骤

tan (x) = - 2 + 1

使用反三角函数性质

tan (x) = - 2 + 1

tan (x) = - 2 + 1

的通解

tan (x) = - a \Rightarrow x = arctan (- a) + πn

x = arctan (- 2 + 1) + πn

x = arctan (- 2 + 1) + πn

以小数形式表示解

x = - 0.39269 \dots + πn

cos (x) = 0.914

cos^{2} (x) + 1 = 0

cos (2 x + \frac{π}{6}) = \frac{1}{2}

(1.54)^{2} = 2 - 2 cos (x)

4 sec (x) + 8 = 0, 0^{\circ} \leq x \leq 36 0^{\circ}