tan(x)=tan(50)

解答

tan (x) = tan (5 0^{\circ})

x = 0.87266 \dots + 18 0^{\circ} n

弧度

x = 0.87266 \dots + πn

求解步骤

tan (x) = tan (5 0^{\circ})

使用反三角函数性质

tan (x) = tan (5 0^{\circ})

tan (x) = tan (5 0^{\circ})

的通解

tan (x) = a \Rightarrow x = arctan (a) + 18 0^{\circ} n

x = arctan (tan (5 0^{\circ})) + 18 0^{\circ} n

x = arctan (tan (5 0^{\circ})) + 18 0^{\circ} n

以小数形式表示解

x = 0.87266 \dots + 18 0^{\circ} n

tan (θ) = 3, 0 < x < 2 π

cos (A) + 1 = 4 cos (A) + 1

3 cos (x) + 2 = 0

sin (θ) = 0.7 cos (9 0^{\circ} - θ)

cos (θ) = \frac{4}{2}